This is a great, easy dish for a meatless meal but I usually serve some Italian sausage alongside for my meat-loving husband. I sometimes add chopped mushrooms to the sauce. Adapted from a Better Homes recipe.
Cook manicotti according to package directions, being careful to not overcook (or they'll split while you're filling them); drain.
Sauce: cook onion and garlic in butter until tender; stir in flour and blend well, then add milk all at once; Cook and stir till thickened and bubbly; add swiss cheese and wine; stir until cheese is melted.