Instructions: Saute mushrooms in margarine. Reduce heat. Stir in 1/2 cup barbecue sauce, shrimp and horseradish; heat thoroughly, stirring constantly.

OUTDOORS:
Place fish on greased grill over low coals (ash gray). Grill, uncovered, 6 to 8 minutes on each side or until fish flakes easily with fork, brushing frequently with remaining sauce. Serve with shrimp mixture.

INDOORS:
Place fish on greased rack of broiler pan. Broil 5 minutes on each side or until fish flakes easily with fork, brushing frequently with remaining barbecue sauce. Serve with shrimp mixture.

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