A delightful twist on the classic tuna sandwich, featuring a creamy tuna filling, fresh vegetables, and melted cheese.
Open the cans of tuna and drain the liquid.
Draining the tuna well ensures the mixture won't be too wet.
In a mixing bowl, combine the tuna, mayonnaise, finely chopped onion, salt, and black pepper.
Mix gently to keep the tuna flaky for a better texture.
Toast the slices of bread lightly.
Toasting adds a nice crunch and prevents the bread from becoming soggy.
Spread the tuna mixture evenly over half of the toasted bread slices.
Spread the mixture to the edges for even flavor in every bite.
Top the tuna mixture with a slice of cheese, a leaf of lettuce, and a slice of tomato.
Layering the ingredients in this order helps keep the sandwich stable.
Place another slice of toasted bread on top to complete the sandwich.
Press gently to keep the sandwich together without squishing the filling.
Cut each sandwich diagonally and serve.
Diagonal cuts make the sandwiches easier to handle and more visually appealing.