Slice open package with sharp knife; remove sausage casings. Heat oil in large nonstick skillet over medium-high heat. Cook onion until softened, about 5 minutes. Add sausage and tomato; crumble sausage. Cook, stirring constantly until sauce is thickened, about 20 minutes. In large bowl, mix cooked pasta with meat sauce. Top pasta with cheese and serve.
Published in the October 12, 2005 issue of Farm World.