# Ingredient List:
→ Tuna Salad
01 - 2 cans (5 oz each) tuna in water, drained
02 - 1/4 cup mayonnaise
03 - 1 tablespoon Dijon mustard
04 - 1 celery stalk, finely chopped
05 - 2 tablespoons red onion, finely chopped
06 - 1 tablespoon fresh parsley, chopped (optional)
07 - 1 teaspoon lemon juice
08 - Salt and black pepper, to taste
→ Sandwich
09 - 4 slices hearty bread (sourdough or whole wheat)
10 - 4 slices tomato
11 - 1 cup (about 4 oz) shredded cheddar cheese (or Swiss, Gruyère)
12 - 2 tablespoons unsalted butter, softened
# How-To Steps:
01 - Set your oven broiler or toaster oven to broil.
02 - In a medium bowl, combine tuna, mayonnaise, Dijon mustard, celery, red onion, parsley (if using), lemon juice, salt, and black pepper until evenly mixed.
03 - Place bread slices on a baking sheet and lightly butter one side of each slice.
04 - Position bread buttered side up under the broiler for 1 to 2 minutes until lightly golden, then remove from oven.
05 - Flip bread slices so toasted side is down. Spread tuna salad evenly over each, add a tomato slice, then top with shredded cheese.
06 - Return to broiler and cook for 3 to 5 minutes, watching carefully, until cheese is melted, bubbling, and edges are golden brown.
07 - Remove from oven, allow to cool slightly, then serve warm.