Tuna Melt with Sweet Pickles

Ingredients (9)

• 2 5- ounce cans chunk light tuna
• 1 medium shallot
• 1/4 cup low-fat mayonnaise
• 2-3 large sweet pickles
• 1/8 teaspoon salt
• Freshly ground pepper
• 2 to matoes
• 1/2 cup shredded sharp Cheddar cheese
• 4 slices whole-wheat bread