Clean and remove mushroom stems. Mix Salads of the Sea® Seafood Salad with mustard and pepper sauce.
Melt butter in small saucepan. Place mushroom caps on baking sheet, stem side up. Brush with melted butter. Add breadcrumbs and Parmesan cheese to the remaining butter. Stuff mushrooms with Seafood Salad. Top with breadcrumb mixture, patting onto each stuffed mushroom.
Preheat broiler to 450º F. Place baking sheet 3 to 4 inches from the heat source and broil 5 minutes or until browned. Serve warm, or transfer to an oven-safe dish for reheating.