1Cook and drain manicotti shells.
2Cook beef in oil in large skillet over medium high heat until brown, stirring to separate meat; drain fat.
3Stir in onion powder, salt and pepper.
4Stir in 1 cup of the spaghetti sauce; cool and set aside.
5Reserve 1/2 cup of the ground beef mixture.
6Combine remaining beef mixture with cheese in large bowl.
8Arrange in greased 13x9" pan.
9Combine remaining spaghetti sauce with reserved beef mixture in small bowl; blend well.
11Cover with foil and bake in preheated 350 oven 20-30 minutes or until hot.