HEAT the oil in a wok. Fry the chicken until it is sealed, stirring frequently. Remove from oil and put in a pan. Heat the butter in a wok and fry the garlic, ginger and chillies for one minute. Add the onions and fry till well browned. Add half of the curry masala powder and stir well. Add the chicken pieces and salt and saute for 10 minutes. Add the fried onions, soup cubes and water to the chicken. Mix well. Cook till done and dry. Add the green chillies, tomato slices and the remaining curry masala powder and saute for three minutes. Serve garnished with coriander leaves with a squeeze of lemon juice. NOTES : A sort of spicy cross between a plain stew and a curry, really tasty, and you can add as many chillies as you like