Crumble the beef and sausage into a large heavy skillet on top of the stove. Add the onions and cook over med-high heat, stirring occasionally, until the meat is well browned, about 8 min. Drain off excess fat. Transfer the meat mixture to a crockpot. Stir in the garlic, pasta sauce, tomatoes with their liquid, and dried basil. Cover and cook on low 4 to 4 1/2 hours. Stir in fresh basil and cream. Spoon the sauce over noodles and toss. Serve at once.