Rinse hens, trim off excess fat, and pat dry; place in bowl. Put garlic and ginger in food processor and process until nearly smooth. In another bowl, combine soy sauce, honey, oil, orange juice, and zest. Add the garlic and ginger. Pour mixture over game hens, coating well. Refrigerate overnight, turning in marinade several times.
Preheat oven to 350 degrees F.
Place game hens in shallow roasting pan; pour marinade on top. Bake for 1 hour, basting every 15 minutes. Remove hens to serving platter. Pour cooking juices into small, heavy saucepan and boil for 4 minutes, or until sauce thickens. Pour over hens just before serving. Serve with sesame noodles or rice pilaf. These hens can also be grilled; just remember to baste often.