1 lb. ground beef
2 c. red marinara or spaghetti sauce
1/2-1 c. grated Mozzarella cheese
3/4 lb. penne pasta (sm. pasta tubes)
Parmesan cheese

Bring four cups of water to a boil. Add pasta and cook until just tender. Brown ground beef and drain excess fat. Simmer marinara and ground beef while pasta cooks. Drain pasta and mix with sauce. Pour all into a 3-quart baking dish and top with desired amount of Mozzarella cheese. Bake uncovered at 350 degrees for 25 minutes. Serves 6.