Start off with a pound of hot dogs. Cut a lengthwise slit in each hot dog, without cutting all the way through. Get 2 cups of leftover or fresh mashed potatoes, instant ones are fine. Mix 1/2 to 1 cup of shredded cheese with the mashed potatoes. Stuff the hot dogs with the cheesy potatoes. Arrange the stuffed dogs on a cookie sheet. Bake at 400° for about 15 minutes. The potatoes should be brown and hot and the cheese should be melted. Serve hot to hungry children. Excellent use for leftover mashed potatoes.