Just did this at home with fresh-caught striper, but any robust white fish will do.
Take rice flour and mix in a tablespoon of garlic powder and a tablespoon of southwest rub...something with salt, paprika, red pepper, etc. and add a tablespoon of dried parsley flakes.
Squirt the fish with lemon juice, dredge it in the flour mix, then into egg, then into the flour mix and into a pan with a little butter and olive oil. You know the rest.