Heat the oil in a large saucepan over medium-high heat, add the onions, carrots, and celery, and cook until tender, about 5-7 minutes.
Add the garlic and mustard, sprinkle on the flour, mix, and cook for 2 minutes.
Add the broth, macaroni and nutmeg, bring to a boil, reduce the heat and simmer until the macaroni is tender, about 10 minutes.
Add the cream and cheese, mix, and let the cheese melt into the sauce.
Season with cayenne, salt and pepper to taste and enjoy!
