Step 1

Preheat the oven to 400°F.

Step 2

In a medium size bowl add the tuna, mayonnaise, lemon juice, celery, green onion, fresh parsley, salt, pepper and mix until well combined.

Step 3

Spread butter on one side of each bread slice. Place 4 slices on a baking sheet, with the buttered side down.

Step 4

Top each slice of bread with ¼ of the tuna salad, 2 slices of the cheddar cheese and tomato slices. Top with the other slices of bread with the buttered side up.

Step 5

Transfer the baking sheet to the oven and bake until the cheesy melts, 5 to 8 minutes.