Preheat oven to 350 degrees
In a medium saucepan, melt the butter on low heat; cool to room temperature. Meanwhile, in a medium bowl. combine the cayenne pepper, black pepper, lemon pepper, garlic power and salt. Set aside. Dip the filets into the melted butter, then coat with the seasoning mixture.
In a large skillet over high heat, sear fish on each side for 2 minutes or until slightly charred.
Place in a 11x7 inch baking dish and pour the Italian dressing onto each filet. Cover baking dish and bake in preheated oven for 30 minutes or until flaky and tender.