Preheat your oven to 350 degrees. Lightly coat the bottom of a glass baking dish with cooking spray.
Line dish with lemon wheels as a base. This serves three purposes, it provides flavor, prevents the fish from drying and elevates the fish allowing hot air to circulate around the fillet and cook evenly.
Pour 1 tablespoon lemon juice over each fillet and season to taste with fine sea salt and freshly ground black pepper.
Bake for 15 minutes, or until fish is pearly white and flakes easily with a fork.
Remove and top with Chimichurri sauce. Enjoy your Lemon Mahi Mahi with Chimichurri Sauce!