In a large bowl, combine the first seven ingredients. Crumble turkey over mixture and mix well. Shape into five 1/2-in.-thick patties.
On a lightly oiled grill rack, grill burgers, uncovered, over medium heat or broil 4 in. from the heat for 8-10 minutes on each side or until a thermometer reads 165° and juices run clear, basting occasionally with marmalade.
Grill buns, cut side down, for 2-4 minutes or until lightly browned. Serve burgers on buns with cheese, onion, tomato and lettuce.