Tear off sheets of heavy duty foil large enough to hold all steaks. Fold sides up to form pan. Grease lightly. Sprinkle steaks with lemon pepper and salt. Place steaks in foil pan and set aside. Combine salad dressing and onion; set aside.
Preheat grill on medium for 10 minutes; turn to low. Brush steaks on both sides with salad dressing mixture; place steaks back in boil pan and place on grill. Close lid and grill 12 minutes. Six on a side or until steaks flake; baste often. Sprinkle with parsley and serve.
