Tuna Melt

Ingredients:
4-lbs. Tuna
3-cups Mayonnaise
1/4-cup Spicy Mustard
1/4-cup Horseradish Sauce
1-Tbsp. Black Pepper
20-30 Diced Grapes

Directions:
Drain and fluff tuna.  Mix mayonnaise, spicy mustard, and horseradish sauce.  Dice grapes and add to tuna.  Add pepper.  Mix all ingredients well.  Turn grill to 325-degrees.  Make sandwich and place on grill.  After grilling, add lettuce and tomato.