Prepare Lime Dressing and refrigerate.
In a medium pan, melt butter and heat.
Lightly salt and pepper fish and place in pan, flesh sides down. Sauté until golden brown, about 4 to 5 minutes. Turn fish over and cook for 4 to 5 minutes or until done. Serve with lime dressing.
In a small bowl, combine mayonnaise, sour cream, lime juice, onion, parsley, cayenne, salt and pepper. Mix well.
Contributed by Joyce Taylor