Prepare Lime Dressing and refrigerate.
In a medium pan, melt butter and heat.
Lightly salt and pepper fish. Dredge lightly in flour.
Place in pan, flesh sides down, and sauté until golden brown, about 4 to 5 minutes. Turn and repeat. Transfer to a platter and serve with lime dressing.
In a small bowl, combine mayonnaise, sour cream, lime zest, lime juice, onion, cayenne, salt and pepper.
Contributed by Joyce Taylor