# The Ingredients You'll Need:
→ Tuna Salad
01 - 1 can (5 oz) tuna in water, drained
02 - 2 tablespoons mayonnaise
03 - 1 teaspoon Dijon mustard
04 - 1 tablespoon finely chopped red onion
05 - 1 tablespoon finely chopped celery
06 - 1 teaspoon lemon juice
07 - Freshly ground black pepper, to taste
08 - Salt, to taste
→ Sandwich Assembly
09 - 4 slices sourdough or white sandwich bread
10 - 4 slices cheddar cheese
11 - 2 tablespoons unsalted butter, softened
# Step-by-Step Instructions:
01 - In a medium mixing bowl, blend tuna, mayonnaise, Dijon mustard, red onion, celery, lemon juice, pepper, and salt. Mix thoroughly until combined.
02 - Arrange four slices of bread on a cutting board. Evenly spread the tuna salad over two slices and layer each with two slices of cheddar cheese.
03 - Top with the remaining bread slices to close the sandwiches.
04 - Spread a thin, even layer of softened butter on the outside surfaces of each slice of bread.
05 - Preheat a large skillet or griddle over medium heat. Carefully transfer the sandwiches, placing them buttered side down into the pan.
06 - Cook each side for 3–4 minutes, pressing gently with a spatula, until the exterior turns golden brown and the cheese melts inside.
07 - Remove sandwiches from the skillet, rest briefly, then slice in half and serve while warm.
