Tuna Salad Sandwich with Vegetable Sides

Drain tuna thoroughly and place in a mixing bowl

Finely dice celery and red onion

Add celery, red onion, and mayonnaise to tuna

Season with lemon juice, salt, and pepper

Mix until well combined

Spread tuna mixture on whole grain bread slices

Cut carrots into sticks and cucumber into slices

Serve sandwich with carrot sticks and cucumber slices on the side