Grease a 9 x13 baking dish or sheet pan and preheat the oven to 425 degrees.
Coat fish with lemon juice then sprinkle salt and pepper over filets. Place Cod filets into a greased baking pan. (Note: if using frozen filets be sure to press as much water as possible out of the filets before seasoning.)
In a small bowl mix cayenne pepper, Mrs. Dash, parmesan cheese, and Panko crumbs together.
Pour in melted butter; mix well to coat the crumbs. Then stir in fresh parsley.
Spoon crumb mixture evenly onto the top of the fish filets. Press crumbs into fish.
Place the pan into the oven and bake for 12-14 minutes until the fish is flakey and opaque throughout.
Serve with fresh lemons and garnish with additional parsley if desired.