1 lb. hamburger
2 tbsp. chili sauce
2 tbsp. mustard
1 sm. onion
Salt and pepper to taste
About 1/2 lb. Velveeta cheese, cut into sm. pieces

Mix all together and put on bun halves. Bake at 350 degrees for 20 to 25 minutes. Can be made in advance, put on cookie sheet, and refrigerated until ready to bake.