Place steaks on grill, top with onion then lemon slices. Add wood chips to fire (not to much, just enough to impart some smoke flavor). Cook 3-4 min. then turn with spatula or tongs. Top again with lemon then onion and grill until desired doneness. Do not overcook. Key is really hot grill. Charcoal is preferred. Do not add any more chips after turning. Lightly sprinkle with dill and serve.