Marinate the lamb pieces in salt, pepper and soya sauce for at least an hour and then cook the meat with very little water till ¾ ths done. You could use a regular pan or a pressure cooker.
Heat some oil in a pan; add diced onion, garlic, green chillies and sauté on high heat for a few seconds. Lower heat and then add the red chilli powder followed by the cooked lamb pieces with the stock.
Fry off on high heat till the lamb pieces are coated well. Season with salt if necessary.