slightly adapted from allrecipes
2 (6 ounce) cans solid white tuna in
1/4 cup mayonnaise
1/4 cup finely chopped celery or pickle*
1 1/2 tablespoons finely chopped onion**
1 tablespoon chopped parsley
3/4 teaspoon red wine vinegar
1 pinch salt
1 pinch freshly ground black pepper
4 slices seedless rye bread or thick white bread***
8 slices ripe tomato
8 slices Swiss cheese (I used cheddar)
paprika, for garnish
1. Preheat the oven broiler on low.
2. In a bowl, mix the tuna, mayonnaise, celery or pickles, onion, parsley, and vinegar. Season with salt and pepper.
3. Place the bread slices on a baking sheet, and broil 1 minute on each side in the preheated oven, until lightly toasted. Remove from heat, and spread with the tuna salad. Place 1 cheese slice over the tuna salad on each piece of bread, layer with a tomato slice, and top with remaining cheese slices.
4. Return layered bread to the preheated oven, and broil 3 to 5 minutes, until cheese is melted.****
* I used pickle for an extra salty kick and because that's how my mom always made them.
** I was a little afraid of the onion, but it really amped up the flavor without being overpowering. I really enjoyed the addition of onion in these.
*** Make sure to toast both sides of the bread so you don't end up with a soggy side. I used white bread, because that's what sounded good to me at the time.
**** Broil these on low on the middle rack so the edges of the bread don't burn.