Method:In a large bowl add meat, salt and lemon juice, mix well and set aside for 30 minutes.
Heat oil in a large wok / karahi, add onions and cook on medium flame till transparent, add ginger, and turmeric cook till onions are golden brown, add coriander powder, mustard seeds, garam masala, allspice, and chilies, keep stirring till everything is mix well.
Add mutton pieces and stir until the spices cover the meat well. add water and cover the wok with a lid and lower the flame to simmer for about 45 minutes til the lamb is cooked.
When the meat is cooked, add chopped coriander and tomato, and mix well.
serve with chapatis, naans or boiled rice.