6 slices wheat bread
1 med. onion, sliced thin
2 tsp. mustard
1 c. grated Jack cheese
1/2 c. mayonnaise
1/2 lb. sliced mushrooms
2 tbsp. butter
1/2 c. fresh parsley
1 tsp. salt
1/3 c. grated Parmesan cheese

Brown onions and mushrooms in butter. Cool a little, then mix all ingredients except Parmesan. Spread on bread or crackers. Sprinkle with Parmesan. Broil 5 inches from heat.