Remember to stir the chop suey occasionally as it cooks to make sure the macaroni doesn’t clump together.
Depending on how much of the sauce evaporates after cooking the noodles and adding the cheese, you may want to add a little more beef broth to the pot.
Does your chop suey look runny? It will thicken further as it cools, but if you’re worried about it, you can add some extra macaroni to absorb some of the sauce.