Say what now?

For a couple of weeks now Luke has been asking for "pepperoni cheese" and Matt and I have failed to figure out what pepperoni cheese is. We have him repeat himself (sounds the same every time and we're still clueless), we open the fridge and guess and guess to no avail. One evening last week Maya asked for macaroni and cheese for dinner and Luke came up to the pantry and said "Yeah, pepperoni cheese!" It finally dawned on me: pepperoni cheese = macaroni and cheese!