Beat all ingredients at medium speed with an electric mixer until blended. Shape into 12 patties.
Prepare fire by piling charcoal or lava rocks on 1 side of grill, leaving the other side empty. Coat food rack with cooking spray, and place on grill. Arrange patties over empty side; grill, covered with grill lid, over high heat (400° to 500°) 12 minutes on each side or until done.