# What You Need:
→ 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 (4 oz) shredded cheddar cheese (or Swiss, Gruyère)
12 - 2 tablespoons unsalted butter, softened
# How To Make It:
01 - Preheat your oven broiler or toaster oven to broil setting.
02 - In a medium bowl, combine tuna, mayonnaise, Dijon mustard, celery, red onion, parsley if using, lemon juice, salt, and black pepper until thoroughly mixed.
03 - Arrange bread slices on a baking sheet and lightly spread softened butter on one side of each slice. Place buttered side up under the broiler for 1 to 2 minutes until lightly golden, then remove from oven.
04 - Flip each bread slice so toasted side is down. Evenly distribute tuna salad over each slice, top with a slice of tomato, and sprinkle shredded cheese generously.
05 - Return baking sheet to the broiler and cook for 3 to 5 minutes, monitoring closely until cheese is melted, bubbly, and edges are golden brown.
06 - Remove from oven, allow to cool slightly, and serve warm.