Pretty cheap and really good, plus you can customize them!
1 box Pizza crust mix (you could make it from scratch I guess, but I don't)
4 oz cheese - your choice
fillings of your choice - ham, pepperoni, veggies, chicken, etc
Mix crust according to box instructions. Let rise for twice as long as it says. Dump onto well floured surface and roll into a rectangle about 12x8. Cut dough into 3 pieces about 4x8 each. Pile fillings onto one half, spread out to the edges of that half. The toppings should stack at least an inch high. Fold over and seal edges with water. Cook on a greased cookie sheet at 350' for 10-12 minutes. They should be just barely turning brown. Eat warm.
Or, you can keep them in the freezer. Wrap individually. When you take them out, microwave them for 1-1.5 minutes.