STIR meat with parsley, cherries, onion, Worcestershire, mustard and salt in a medium bowl. Mix gently with your hands or a fork. (Over-mixing can toughen burgers.) Shape into 4 1/2-in.-thick patties. Make a shallow depression in centre of each to help keep their shape while cooking.
OIL grill. Barbecue burgers, with lid closed, until cooked through, 4 to 5 min per side.