1 (1/2 oz.) jar sliced mushrooms, drained
1/4 c. chopped onion
1/2 c. shredded Swiss cheese
2 tbsp. chopped black olives
1/2 c. Longhorn cheese
1/3 c. Miracle Whip salad dressing
2/3 c. chopped summer sausage
1 loaf cocktail rye bread

Mix all together (can make ahead) and put on bread. Broil until cheese melts. Serve warm.