In A Bowl, Combine The First Eight Ingredients. Crumble Beef Over Mixture And Mix Well. Shape Into Eight 3/4-In.-Thick Patties. Grill, Covered, Over Medium Heat For 5 Minutes On Each Side. Top Each Burger With A Cheese Slice. Grill 1-2 Minutes Longer Or Until The Cheese Begins To Melt. Serve On Buns.