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A tuna salad sandwich is a classic lunch staple made by mixing canned tuna with mayonnaise, often combined with ingredients like celery, onion, and relish, then served on sliced bread. It's a simple, no-cook dish that's widely popular in the United States and other English-speaking countries.
This sandwich is a good source of protein from the tuna and healthy fats from the mayonnaise, though it can be moderate in carbohydrates from the bread. A typical serving provides around 400-500 calories, along with omega-3 fatty acids and B vitamins.
Culturally, it's a symbol of quick, affordable home cooking and office lunches. Nutritionally, it's a convenient way to incorporate seafood into a diet, though the choice of bread and mayo can significantly alter its health profile.