Place oil in a large skillet OR in the bottom of your instant pot.
Fry the beef until browned. (For the instant pot use the saute button and fry), Place in the crockpot.
Pour in the broth,tomatoes and sauce.
Cook on low for 6-8 hours. Stew beef is the best when you cook it low and slow. You can make this in a pot and cook for an hour or two, but there's nothing like beef that falls apart thanks to being cooked all day long.
Half an hour before serving, mix in the pasta. Let it cook until it has softened.
Serve topped with a sprinkle of parmesan cheese if desired!