Paprika In buttered au gratin dishes, place one filet on bottom, top with scallops, crab, shrimp, cheese, and second filet. Set aside. Melt butter. Place remaining ingredients in bowl. With mixer on high, slowly add butter in steady stream until sauce is thickened and creamy. Pour sauce over fillets and bake at 450^ for 10 to 15 minutes. Sprinkle parsley over stuffed fillets and dust with paprika.