Tuna Salad Sandwich on Whole Grain – Catalina Cooks

Ingredients

• 1 can (5 oz) tuna, drained
• 2 tbsp mayonnaise
• 1 stalk celery, finely chopped
• 1/4 red onion, finely chopped
• Salt and pepper to taste
• 2 slices whole grain bread
• Lettuce leaves
• Tomato slices