Open-Faced Tuna Melt Sandwich

Ingredients (11)

• 1 4.5 ounce can tuna (in water)
• 1/4 cup carrots
• 1/4 cup minced celery
• 1 tbsp red onion
• 1 tbsp light mayonnaise
• 1 tsp red wine vinegar
• salt and pepper
• 2 slices whole wheat bread
• 2 slices 2% reduced fat cheddar or American cheese
• 2 slices tomato
• oil spray