How to cook blackened fish

Grind fresh white pepper and black pepper in equal parts, and add about three times as much red chili powder, alternatively red cayenne pepper.  Put in fresh thyme, basil, and oregano, each in parts roughly equal to the white or black pepper.  Pour melted butter over your uncooked fish.  Rub in the spices.  Cook the fish rapidly over high heat, as high as you can manage, in butter, hoping to create a crust by searing the spices.  It is yummy even if you fail to create the crust, squeeze on lemon at the end.