Oven roasted salmon: easy, wonderful one-pan salmon meal. Slow roasting salmon yields fall-apart tender salmon paired with sautéed carrots and onion for the extra flavor. You will enjoy every bite of it!
Preheat the oven to a 350°F. Prepare a 5-qt glass baking dish and set aside. (You do not need to oil it).
Wash 1 (2.5 lb) salmon fillet in cold water. Pat the fish dry with a paper towel. Set on large cutting board lined with paper towels while you prepare next step.
In a large skillet, saute 1 large yellow onion in 3 tbsp vegetable oil over medium heat until golden (about 5 mins). Add 2 large julienned carrots and saute additional 3-4 minutes, stirring often until soft and golden.
Spread 2 tbsp mayo onto the skin side of salmon and sprinkle 2 tsp fine salt and 1/2 tsp ground black pepper. Spread about 1/3 of the sautéed onion and carrots into a glass baking dish. Transfer the salmon into the baking dish, placing seasoned side onto the sautéed vegetables. Now season the top of the fillet. Spread 2 tbsps mayo and sprinkle with 2 tsp fine salt and 1/2 tsp ground black pepper. Spread remaining sautéed onion and carrots onto the fish. Cover the dish with foil.
Place into the preheated oven and bake for 30 minutes.Reduce the oven temperature down to 300°F and continue cooking for 1 hour and 40 minutes. Salmon should be minimum 165°F.
Gently slide cooked salmon onto a serving platter. It will be easy to break apart, therefore be extra gentle. This would be a good time to use more than 2 hands. Garnish with fresh dill or parsley before serving. Enjoy warm or cold, today or tomorrow. Refrigerate salmon once cooled if serving next day.