4 c. cooked macaroni
1 sm. onion, diced
2 eggs, hard boiled, diced
2 pkgs. sm. frozen shrimp, thawed
1 can sliced mushrooms
6 tbsp. mayonnaise
1 tsp. salt
1 tsp. pepper
2 tbsp. mustard
2 med. tomatoes, diced (optional)
3 med. cucumbers, diced (optional)
1 med. bell pepper, diced (optional)
3 celery stalks, diced (optional)
1 can black or green olives, diced (optional)
1 tsp. paprika (optional)
1 tsp. garlic salt (optional)
1 tsp. salad seasoning (optional)
1 tsp. celery salt (optional)
1 tsp. parsley flakes (optional)
1 tsp. Worcestershire sauce (optional)

Cook macaroni and eggs. Add all ingredients including optional items you desire in large bowl and toss. Chill before serving.