Cook smoked sausage in large deep skillet. Remove sausage from Skillet.
Add ground beef, mushrooms, onions and garlic to skillet. Cook until ground beef if browned.
Add sausage, tomatoes, spaghetti sauce and water to skillet. Cover and bring to boil.
Stir in pasta; cover and simmer on medium-low for 20 minutes or until pasta is tender. Stir occasionally.
Remove from heat; top with cheese and green onions.