Swap out traditional items for an original sandwich. At 'wichcraft,' tuna sandwiches are made without mayonnaise, Barbera said. Instead, he seasons the tuna with red wine vinegar, olive oil, capers, oregano, salt and pepper, and red onions. "It makes it feel a little more healthy, and you can taste the tuna when it's not masked by mayonnaise," Barbara said. Instead of lettuce and onion, you can also add some chopped green olives; lemon confit, which can be purchased at gourmet stores; and some sliced fennel dressed in a lemon vinaigrette.