I am absolutely thrilled to share my favorite way to enjoy salmon, which just happens to be this Oven Baked Honey Mustard Salmon with Roasted Spinach Recipe. The combination of tangy honey mustard glaze with perfectly roasting salmon and tender spinach feels like a special treat on any day of the week. Whenever I make this dish, I feel like I’m treating myself and my loved ones to something that tastes gourmet but is surprisingly simple to prepare at home.

Why You'll Love This Oven Baked Honey Mustard Salmon with Roasted Spinach Recipe

What really excites me about this dish is the wonderful balance of flavors. The sweet yet slightly sharp honey mustard glaze plays so perfectly with the rich, buttery flavor of the salmon. Adding fresh garlic and parsley to the mustard mix gives it an aromatic kick that layers beautifully with the brightness of fresh lemon juice. The roasted spinach brings a lovely earthiness and just the right amount of texture contrast. Each bite feels fresh, satisfying, and just downright delicious.

Aside from how amazing it tastes, I adore how easy this recipe is to pull together. Brining the salmon for just 15 to 20 minutes makes a noticeable difference, giving the fish extra moisture and tenderness without requiring complicated prep. Plus, you cook the salmon and spinach simultaneously in the oven, which saves so much time in the kitchen—perfect for busy weeknights or casual dinner parties. This is the kind of dish that impresses guests but rarely stresses me out, and I think you’ll feel the same way once you try it.

Ingredients You'll Need

The image set shows a cooking process on a white marbled surface. The first image shows a white bowl with a yellow sauce being mixed by a spoon next to an open jar of yellow mustard and lemon slices. The second image shows a white bowl filled with fresh green spinach leaves with a dollop of the same yellow sauce on top. The third image shows several raw orange salmon fillets laid out on a metal tray, being brushed with the yellow sauce by a woman's hand holding a brush. The last image displays the metal tray now filled with cooked dark green spinach leaves, slightly wilted and spread evenly across the tray. Photo taken with an iphone --ar 4:5 --v 7

The beauty of this Oven Baked Honey Mustard Salmon with Roasted Spinach Recipe is in its simplicity. Each ingredient serves a distinct purpose, whether it’s enhancing flavor, adding freshness, or contributing to those perfect textures that elevate a humble dinner into something special.

Salmon fillets: I recommend choosing fresh, evenly sized fillets for consistent cooking.
Extra-virgin olive oil: Adds richness and helps to keep the salmon moist while roasting.
Fresh parsley: Finely chopped to bring a fresh herbal note that brightens up the dish.
Minced garlic: Provides a savory depth that perfectly complements the honey mustard glaze.
Maille Honey Dijon mustard: The star ingredient for that perfect sweet tangy glaze—feel free to swap with your favorite honey mustard.
Lemon juice: Adds a fresh citrus brightness that balances the salmon’s richness.
Fresh spinach: Roasted gently to become tender yet vibrant, pairing beautifully with the salmon.
Salt and pepper: Essential seasonings to enhance all those beautiful flavors.
Lemon wedges (optional): A fresh squeeze at the end adds a lovely finishing touch.
Cold water and salt for brine: This quick brine ensures your salmon stays moist and flavorful after cooking.

Directions

Step 1: Prepare the brine by combining 3 cups of cold water with 3 tablespoons of salt in a large shallow bowl or baking dish. Stir until the salt is fully dissolved.

Step 2: Cut the salmon into six even fillets, then place them flesh-side down into the salted water brine. Let them soak for 15 to 20 minutes to enhance moisture and flavor.

Step 3: While the salmon is brining, preheat your oven to 425 degrees Fahrenheit. This high temperature will help you get a nicely roasted salmon with slightly crisp edges.

Step 4: In a small bowl, mix together the Maille honey mustard, minced garlic, finely chopped parsley, and fresh lemon juice. This mixture will become the flavorful glaze that defines this recipe.

Step 5: After brining, pat the salmon dry very thoroughly with paper towels. Season each fillet with freshly ground black pepper. Brush each fillet on both sides with olive oil, then brush half of the honey mustard mixture generously over the top of each fillet. Arrange the salmon fillets on a prepared baking sheet.

Step 6: Roast the salmon in the oven for about 20 minutes. You want the salmon to be cooked through but still moist and flaky. Keep an eye on it starting around 18 minutes to avoid overcooking.

Step 7: While the salmon roasts, place the fresh spinach in a bowl with the remaining honey mustard mixture and toss to coat evenly.

Step 8: Spread the coated spinach on a smaller baking sheet and roast it in the oven for 5 to 7 minutes, timing it so that it finishes cooking just as the salmon is done.

Step 9: To serve, pile the roasted spinach on plates and top with a honey mustard glazed salmon fillet. For an extra burst of flavor and freshness, brush additional honey mustard on top of the salmon and offer lemon wedges on the side.

Servings and Timing

This Oven Baked Honey Mustard Salmon with Roasted Spinach Recipe makes 6 generous servings, perfect for family dinners or entertaining friends. The prep time is about 10 minutes, largely to prepare ingredients and the brine, while the cook time is around 20 minutes for the salmon plus an additional 5 to 7 minutes to roast the spinach. Altogether, the total time needed is approximately 45 minutes, making this a wonderfully manageable meal option even on busy days. There is no significant resting or cooling time required, so you can dig in hot and fresh right away.

How to Serve This Oven Baked Honey Mustard Salmon with Roasted Spinach Recipe

A white plate holds a cooked piece of salmon with a shiny, golden glaze on top, placed over a bed of dark green cooked spinach. Two thin lemon slices rest beside the salmon, adding a bright yellow contrast. Above the plate, there is a small white bowl filled with a smooth, mustard-yellow sauce and a silver spoon inside it. The plate sits on a white marbled texture surface, creating a clean background. Photo taken with an iphone --ar 4:5 --v 7

When I serve this dish, I like to keep the presentation clean and inviting. The vibrant green of the roasted spinach creates such a welcoming bed for the golden honey mustard salmon. I often place a fillet on a generous mound of spinach to remind everyone of that perfect flavor combination. To finish, I squeeze a little fresh lemon juice over the top and sometimes add a sprig of parsley for a fresh herbal garnish.

For sides, I love pairing it with a light grain such as quinoa, couscous, or a warm wild rice blend, to absorb any extra glaze and complement the textures. Simple roasted or steamed vegetables like asparagus or baby carrots work beautifully too, especially if you want to keep the meal gluten-free and light. For a heartier meal, creamy mashed potatoes or a crisp green salad with a lemon vinaigrette provides a wonderful balance.

As for beverages, this dish pairs wonderfully with a crisp white wine like a Sauvignon Blanc or a dry Riesling that complements the tangy glaze without overpowering the fish. For a non-alcoholic option, sparkling water with a splash of lemon or a lightly sweetened iced tea adds refreshing notes. I’ve also enjoyed this at weekend brunches slightly cooled or at room temperature, which makes it very versatile for different occasions from casual family dinners to holiday gatherings.

Variations

I love experimenting with variations on this Oven Baked Honey Mustard Salmon with Roasted Spinach Recipe depending on what’s in my pantry or dietary preferences. One easy substitution is to use maple syrup instead of honey in the mustard glaze for a deeper, woodsy sweetness that pairs beautifully with smoky roasted salmon. For herb variation, swap parsley for fresh dill or tarragon, which bring a lovely aromatic dimension.

If you need a gluten-free version, just make sure your honey mustard sauce is certified gluten-free or make your own using gluten-free mustard and honey. Those following a vegan lifestyle can try this recipe with thick slices of marinated tofu or tempeh, roasting it in the same honey mustard mixture for a plant-based delight. Roasted kale or Swiss chard can be swapped for spinach if you prefer a sturdier green with a bit more bite.

For a slightly different cooking method, I’ve also enjoyed this salmon grilled with the honey mustard brushed on near the end, giving a lovely char while keeping the glaze intact. The spinach can be sautéed quickly with the remaining glaze instead of roasted, which is perfect if you want a softer texture or a faster preparation.

Storage and Reheating

Storing Leftovers

If you happen to have leftovers — though I rarely do! — store the salmon and roasted spinach in airtight containers in the refrigerator. I recommend using glass containers if you have them, as they help keep everything fresh without absorbing odors. The leftovers will keep well for about 2 to 3 days. Be sure to cool the food to room temperature before sealing to prevent condensation inside the container.

Freezing

This recipe can be frozen, though I prefer to freeze only the salmon as the spinach texture changes after thawing. Wrap individual salmon fillets tightly in plastic wrap and then place them in a resealable freezer bag or airtight container. They’ll keep in the freezer for up to 2 months. When you’re ready to enjoy, thaw overnight in the refrigerator to preserve moisture and flavor.

Reheating

For reheating, I find gently warming the salmon in a low 275 to 300 degree Fahrenheit oven works best to avoid drying it out. Heat it for about 10 to 12 minutes until warmed through. You can also reheat spinach in a skillet over medium heat for just a few minutes until warmed. Avoid using a microwave for reheating salmon, which can lead to uneven heating and a rubbery texture. Brushing a little extra honey mustard glaze on top before warming helps refresh the flavors and keeps the fish moist.

FAQs

Can I use frozen salmon fillets for this recipe?

Yes, you can use frozen salmon fillets, but I recommend thawing them completely in the refrigerator before brining and cooking to ensure even roasting and the best texture. Cooking salmon straight from frozen might result in uneven doneness.

Is it necessary to brine the salmon beforehand?

While it’s not mandatory, I highly recommend the brining step. It helps keep the salmon moist and flavorful during cooking, making a noticeable difference in texture. The quick 15 to 20 minute soak is worth the extra step for a tender, juicy result.

Can I make the honey mustard glaze ahead of time?

Absolutely! You can prepare the honey mustard mixture up to a day in advance and store it covered in the refrigerator. Just bring it to room temperature or give it a quick stir before brushing on the salmon and spinach.

What can I substitute if I don’t have Maille Honey Dijon mustard?

If you don’t have Maille, use any good-quality honey mustard you prefer or make your own by mixing equal parts Dijon mustard and honey. The key is to balance the sweetness and tanginess for that signature glaze flavor.

How do I know when the salmon is perfectly cooked?

The salmon is done when it flakes easily with a fork and the flesh has turned opaque. If you have a food thermometer, aim for an internal temperature of 125 to 130 degrees Fahrenheit for moist and tender salmon. Remember it will continue to cook slightly after roasting.

Conclusion

I genuinely hope you give this Oven Baked Honey Mustard Salmon with Roasted Spinach Recipe a try very soon. It’s one of those dishes that makes me feel proud to serve and happy to eat, thanks to its amazing flavors and ease. Whether you’re cooking for a weeknight family dinner or looking to impress guests, this recipe delivers every time with delicious, fresh results. From my kitchen to yours, enjoy every bite!