Place chops in a deep container. Sprinkle with salt; add water to cover. Let stand 1 hour. Drain well. Place chops on rack in a shallow roasting pan.
Combine chili sauce, chopped onion, orange juice, honey, and horseradish, mixing well. Set mixture aside.
Place roasting pan 4 to 5 inches from heating element. Broil lamb chops 5 minutes on each side. Brush with chili sauce mixture; broil an additional 4 minutes on each side, basting frequently with sauce.