Heat closed contact grill for 5 minutes.
Meanwhile, in large bowl, combine all ingredients; mix well.
When grill is heated, for each patty, measure generous 1/2 cup potato mixture; place directly on bottom grill surface. (Each mound will be about 2 inches high. If necessary, cook 3 patties at a time.) Close grill; cook 8 to 10 minutes or until patties are golden brown and crisp.