3(5 ounce) cans tuna fish in water, drained really well and flaked (we like solid white albacore tuna in water)
¾cupfinely diced celery
½cupmayonnaise
1 ½tablespoonssweet pickle relish(or sub with dill pickle relish)
¼teaspoonkosher salt,plus more to taste
¼teaspoonground black pepper,plus more to taste
FOR THE MELTS
8slicesthick-cut white sandwich bread
Softened butter
1large tomato,sliced (optional)
4slicessharp cheddar cheese
For serving: potato chips; pickles
Instructions
Prepare the tuna salad by stirring together tuna, celery, mayonnaise, pickle relish, salt and pepper in a large bowl. Use right away, or cover and refrigerate for up to 1 day.
Preheat a large skillet or griddle over medium-low heat.
Butter one side of each slice of bread. Flip over four of the bread slices and top with the tuna mixture. Add tomato slices (if using), top each with a slice of cheese, then cover with the remaining slices of bread, buttered-side up.
Add the sandwiches to the preheated skillet and cook until the bottom bread is golden brown and toasted. Flip and cook on the other side until the bread is golden brown and the cheese has melted. Turn the heat to low if the outside of the sandwich starts to get too dark before the cheese melts.
Remove the sandwiches to a cutting board, slice in half, and serve.
Notes
Use solid white albacore tuna for best flavor and texture.
Drain tuna well.
Layer tomato beneath cheese to reduce sogginess.
For an open-faced option, toast bread or an English muffin first, top with tuna, tomato, and cheese, then broil until the cheese melts.