Here is a good old combination of cheese, macaroni, and bacon. The difference is the pasta being cooked in milk instead of water. It could be an interesting way of preparing the dish.
Put the instant pot in mode browning
Fry the bacon
Add the onion and rosemary
When the onion and rosemary are brown, add the cornstarch, milk, and pasta
Switch to pressure cooking 8min
At the end of cooking, add the cheddar stir and close the cookeo to melt it
Servings 4