tuna melt

Ingredients

• 2 cans albacore tuna packed in water, drained (7 oz)
• 1/2 cup mayonnaise
• 1/4 cup sour cream
• 1 tablespoon Dijon mustard
• 1 stalk celery, chopped
• 2 tablespoons finely chopped red onion
• 1/3 cup sweet pickle relish
• 1 1/2 tablespoons freshly chopped parsley, divided
• 1/2 teaspoon dried dill weed
• 1/4 teaspoon freshly ground black pepper
• 6 slices sourdough white, rye, whole wheat, or pumpernickel bread
• 12 slices tomato (thin)
• 1 1/4 cups shredded cheddar