Open-Faced Tuna Melt Sandwich

Step 1

Combine tuna, celery, carrots, onion, mayonnaise, vinegar, salt and pepper.

Step 2

Heat a large skillet over low heat.

Step 3

Spray skillet with oil, and place two slices of bread on top.

Step 4

Top bread with cheese, then tuna salad and tomato. Cook on low heat until cheese melts and bread gets toasty.

Step 5

Serve immediately.