I had a housemate, who loved my mac and cheese, but he was on an antidepressant called Parnate. Cheese is poison, literally, to anyone on Parnate, except for the stuff he called "Processed Canadian". What I'd do for him was put a couple of slabs of the plastic cheese on top of the cooked macaroni, and pour on the batter.
Eventually, he went on a different antidepressent, and ate grated cheddar again. He also ate "Processed Canadian", apparently, he liked the stuff.