My high school used to make these pizza muffins to sell at the canteen and they were awsome, i still make them sometimes.
Its just an english muffin toasted in the toaster, smother with tomato paste, sprinkle some italian herb blend on it and top with sliced tasty cheese and just stick it under the grill for the cheese to melt
Muffins can be on the expensive side so you could prolly use normal toast for it even