Brown sausage and ground beef over medium-high heat. Add onions and carrots and saute for 5 minutes. Put meat mixture into crock-pot with remaining ingredients. Cook on low for 6-8 hours or on high 3-4 hours. At last hour cook pasta to aldente, add to slow cooker and let cook for the last 30 minutes. Serve in bowls over cubes of cheese and garnish with grated Parmesan cheese.