Ingredients

· 2 cans white tuna

· ½ cup mayonnaise

· cup diced onion

· 2 tablespoons sweet pickle relish

· 1 tablespoon Dijon mustard

· Salt and ground black pepper

· 4 tablespoons unsalted butter

· 4 slices white bread

· 6 slices ripened tomato

· 6 thick cheddar cheese slices

Method

In a bowl, combine the tuna, mayo, onion, relish, mustard, ½ teaspoon salt, and ¼ teaspoon ground black pepper and mix until incorporated. Spread one tablespoon of butter on one side of each piece of bread, and then flip the slices over so they are buttered-side down. Divide the tuna mixture between two slices of bread, then top with the tomato slices and cheddar. Place the remaining two slices of bread on top, buttered-side up. Heat a heavy skillet over low heat and toast the sandwiches in it until the cheese is melted and the bread is golden and toasty, five minutes per side. And enjoy!