Not very healthy, but cheap and yummy!
One 12 ounce can of spam, sliced into about 8 slices and arranged in a baking dish.
Mix: 1/3 cup brown sugar, 1/2 t. vinegar, 1/2 cup water, and 1/2 t. dry mustard. Combine well and pour over meat slices. Bake at 375 for about 30 minutes, basting occasionally.