Grilled Tuna Melts

Ingredients

• 1 (5oz) can of tuna packed in water, drained and patted dry
• 1/3 cup mayonnaise (or less to taste)
• 1 tsp Dijon mustard
• 1/3 cup diced English cucumber (1/4” dice)
• 1/3 cup diced red or orange sweet bell pepper (1/4” dice)
• ¼ cup finely diced yellow or red onion
• 1/3 cup kalamata olives (pitted, dried, and diced)
• 2 Tbsp capers (drained and patted dry)
• 1 Tbsp finely chopped fresh tarragon
• 1/2 tsp lemon juice
• 1/4 tsp freshly grated lemon zest
• Salt
• pepper
• Slices of Havarti, Fontina or Gouda cheese
• 4 slices sourdough bread