Cook pasta according to package directions, omitting salt and fat.
Drain. While pasta cooks, combine spaghetti sauce and next 4 ingredients in a medium saucepan. Bring to a boil; cover, reduce heat, and simmer 10 minutes. Coat a 13- x 9- x 2-inch baking dish with cooking spray; add spaghetti, and spoon sauce over spaghetti. (Casserole may be covered and refrigerated at this point and baked later.
Bake 35 minutes or until thoroughly heated.)
Bake at 375 for 25 minutes or until thoroughly heated.
