3 c. shell macaroni, cooked
2 tsp. prepared mustard
2 tbsp. onions (or more)
1/2 c. green pepper, chopped
2 c. boiled shrimp, cut up
1/2 c. salad dressing
1 c. celery
2 tbsp. pickle relish
1 can tuna fish
Garlic salt (sprinkle on top)

Mix all together and refrigerate, covered, until serving time.