Step 1Mix the lemon juice, garlic, yogurt, oil, salt, pepper and coriander in a large bowl.
Step 2Cut the lamb into 1-inch chunks and stir into the lemon juice mixture. Cover the bowl with plastic and marinate 4 hours to overnight.
Step 3Put about 5 pieces of lamb on each of 12 metal skewers. Grill 6 to 8 minutes. Serve in lavash or chapati bread garnished with onion, tomatoes and lemon wedges.