Cut the fish into two pieces and marinate in the lemon juice in a bowl for 10-15 minutes.
Preheat oven 220c
Melt 2 T (28 grams)butter in a baking dish in the oven. Remove and add the fish, coating it with the butter, and then add in the lemon juice. IMPORTANT-the dish should hold the fish tightly enough that it can be submerged in the sauce.
Add 2 T(28 grams) butter to top the fish and bake for 10 minutes.
Remove from oven; top with herb(s), cayenne, and cheese. Add 2 (28 grams) more of butter and bake an additional 10 minutes. Cheese should be crusted and the liquid simmering.
Remove to plate. Spoon over a bit of the hot liquid. Dust with parsley.
