This oven-baked sheet pan cod dinner features tender cod fillets roasted alongside a medley of yellow potatoes, carrots, and fennel. Tossed with a simple lemon, garlic, and thyme dressing, this healthy and easy one-pan Mediterranean-inspired meal delivers fresh and vibrant flavors. Perfect for a quick weeknight dinner or meal prep, it's gluten-free and low lactose, making it suitable for various dietary needs.