Tuna salad

Tuna salad is a salad dish consisting of tuna and mayonnaise. The tuna used is usually pre-cooked, canned, and packaged in water or oil. Pickles, celery, relish, and onion are popular ingredients to add. Tuna salad is used to make tuna fish sandwiches; it can also be served on top of crackers, lettuce, tomato, or avocado (or else served by itself).