Leftover ham, cut into sm. chunks (1/2 inch cubes)
Cheese - whatever is in your refrigerator, cut into 1/2 inch cubes
Tomatoes, cut into sm. cubes

Mix with enough mayonnaise to hold this together. Add black pepper to taste

Lay slices of toast on a broiler pan. Top with ham/cheese/tomato mixture. Place in broiler until top just begins to bubble or brown.

You can vary the amounts according to what you have on hand. My mom never measured this but it was a family favorite.