tuna fish sandwich
Ingredients and preparation：
A tuna fish sandwich is usually made with canned tuna mixed with mayonnaise and other ingredients such as chopped celery, hard-boiled egg, pickle, onion, or black olives. Other recipes may use olive oil, salad cream, or yogurt instead of mayonnaise.
A tuna melt has melted cheese on top of the tuna or on a tomato slice and is served on toasted bread. A tuna boat is a tuna sandwich served in a hot dog bun.