Tuna Panini Melt

Details

Ingredients

• 1 (5 ounce) can solid white albacore tuna in water (such as Bumble Bee®)
• 1 tablespoon mayonnaise
• 1 tablespoon balsamic vinegar
• 1 tablespoon chopped onion
• 1 dill pickle, chopped
• 4 slices sourdough bread
• 2 slices American cheese