Remove the liquid from the canned tuna.

Combine tuna, cheddar cheese, onion, mayonnaise, pickle relish, sugar, and celery. Mix well.

Taste the mixture and then add salt and pepper as needed.

Toast the hamburger buns or loaf slices

Arrange the tuna salad in between the buns. You may add vegetables such as sliced tomato and lettuce, if desired. You can also slice the bread in half.

Serve. Share and enjoy!