Best Bell Pepper Tuna Melts Recipe - How To Make Bell Pepper Tuna Melts

Ingredients

• 4 yellow and orange bell peppers
• 2 tbsp. extra-virgin olive oil 
• Kosher salt
• Freshly ground black pepper
• 2 (5-oz.) cans tuna, drained
• 1 large stalk celery, finely chopped
• 1/2 small red onion, minced
• 1/3 c. mayonnaise
• 2 tbsp. chopped dill, plus more for garnish
• 2 tbsp. pickle relish
• 1 tbsp. Dijon mustard
• 1 tbsp. fresh lemon juice
• 8 slices Swiss cheese
• Freshly chopped chives, for serving