Tuna Melt

Name: Tuna Melt
Prep time: 10 min
Cook time: 5 min
Total time: 15 min
Yield: 2
Ingredients: Ingredients; Tuna Salad; 2 cans (5 oz each) tuna, drained; 1/4 cup mayonnaise; 1 tablespoon Dijon mustard (optional); 1 tablespoon lemon juice; 2 tablespoons finely diced celery (optional); 1 tablespoon finely diced red onion or green onions; Salt and pepper, to taste; Sandwich; 4 slices of bread (sourdough, rye, or white bread work well); 4 slices of cheddar or Swiss cheese; 2 tablespoons butter (for toasting); 2 tablespoons olive oil (optional, for extra crispiness); Tomato slices (optional); Pickles (optional)