Tuna Melt Sandwich Recipe

Ingredients (13)

• 10 ounces tuna (two 5-ounce cans)
• 1/3 cup mayonnaise
• 1 teaspoon Dijon mustard
• 3 tablespoons finely chopped red onion
• 3 tablespoons finely chopped celery
• 3 tablespoons chopped parsley
• 1 tablespoon lemon juice (or pickle juice)
• 1 tablespoon chopped fresh dill, optional
• 1/8 teaspoon ground black pepper
• 1 large tomato (thinly sliced, 8 slices)
• 6 ounces shredded cheddar cheese (1 1/2 cups, or about 8 thin slices of cheddar or American cheese)
• 8 slices bread
• 3 tablespoons butter (softened)