Preheat the oven to 400 F and grease a 9x13" casserole dish with olive oil.
Add the pasta, ground beef, chicken broth, tomato sauce, garlic, onion, ground mustard, salt and pepper to the casserole dish. Stir to combine, making sure that the pasta is mostly covered by the liquid.
Cover the casserole dish and transfer to the oven. Allow to bake for 40 minutes.
Remove the cover and top with cheese if desired and return to the oven for 4-5 minutes or until the cheese is melted.