Mac and Cheese Soup

macaroni pasta (shells, elbows, whatever you have about)

vegetable oil

small onion (chopped)

medium carrot (diced)

celery stalk (diced)

salt and pepper

butter

flour

cayenne pepper

mustard powder

hard cider (such as Angry Orchard Hard Cider)

low-sodium chicken broth

milk

sharp cheddar cheese (shredded)

mozzarella cheese (shredded)

Parmesan cheese (shredded)

scallions (green parts only, sliced)