How to Make It
Cook pasta according to package directions; rinse in cold water. Drain. Place in a single layer on a wire rack; set aside.
Remove casings from sausage, and discard. Cook sausage, ground round, and onion in a large skillet, stirring until meat crumbles and is no longer pink. Drain and set aside.
Add wine to skillet, stirring to loosen browned bits; bring to a boil. Add whipping cream and next 3 ingredients; reduce heat, and simmer, stirring often, 15 minutes or until thickened. Remove from heat; cover and set aside.
Combine meat mixture, tomatoes, and mozzarella cheese. Spoon mixture evenly into 12 manicotti shells; arrange shells in a lightly greased 13- x 9-inch baking dish.
Bake, covered, at 350° for 20 minutes. Uncover and pour cream mixture evenly over shells; sprinkle with Parmesan cheese. Bake, uncovered, at 350° for 10 more minutes. Broil, 5 1/2 inches from heat, 2 to 3 minutes or until cheese is lightly browned.