The Unexpected Ingredient J. Kenji Lopez Alt. Adds To Tuna Salad Sandwiches

There are few sandwiches more nostalgic than the simple tuna salad. Flakes of canned tuna folded into rich mayonnaise with crisp slices of celery and tart relish between a few slices of bread. Or, with the inclusion of a slice of cheese and a burst of heat from a broiler, a…

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