Cook manicotti according to package directions; drain. Rinse with cold water; drain again. Meanwhile, for sauce, in a medium saucepan heat oil over medium-high heat. Add onion and garlic; cook until onion is tender, stirring occasionally. Stir in tomatoes, wine, and tomato paste. Bring to boiling; reduce heat. Simmer, covered, for 30 minutes.
Using a small spoon, carefully fill each manicotti shell with about 1/4 cup of the filling. Arrange filled shells in an ungreased 3-quart rectangular baking dish. Pour sauce over shells. Sprinkle with the remaining 1/2 cup mozzarella cheese. Cover with foil. (To serve today, omit Step 4. Continue as directed in Step 5, except bake for 30 to 35 minutes.)
Chill for 2 to 24 hours.
Preheat oven to 350 degrees F. Bake, covered, about 45 minutes or until heated through. Let stand, covered, for 10 minutes before serving.