Bring 4 quarts of water to a boil. Heat a large frying pan and add oil, beef and garlic. Saute until the meat is tender and then drain excess fat. Add all remaining ingredients except the Mozzarella cheese and pasta.
Simmer the mixture while pasta cooks until al dente. Drain pasta and mix it with the sauce. Pour all into a 3 quart baking dish and top with the remaining cheese. Bake uncovered at 350F for 25 minutes or until bubbly hot.