Sauce: Saute garlic in butter 3 minutes. Stir in flour and seasonings. Remove from heat; gradually stir in cream. Bring to boil over medium heat, stirring constantly. Boil and stir 1 minute. Reduce heat to low. Stir in cheese until melted. Set aside.
For cannelloni, parboil according to package directions. Rinse and drain. Meanwhile, saute onion in butter until tender, about 3 minutes. Remove from heat; stir in remaining ingredients. Preheat oven to 350 degrees. Fill shells; place in buttered 2-quart dish. Spoon sauce over cannelloni. Bake for
