Mutton and potato curry

Ingredients	For 4	For 100
Mutton	500gms	12.5kg
Potatoes	225gms	5.6kg
Coriander powder	30gms	680gms
Garlic	4 flakes	50gms
Green chillies	5gms	115gms
Onions	115gms	2.8kg
Turmeric	4 tsp	50gms
Chilli powder	10gms	225gms
Ginger	1 piece	55gms
Tamarind / vinegar	a little	225gms
Fat	30gms	500gms
Salt	to taste	100gms

Wash and cut up the meat. Wash, peel and cut the potatoes. Slice onions, peel and slice half the garlic and ginger. Soak tamarind. Grind remaining half of garlic and ginger. Heat the fat. Fry onions, sliced garlic, ginger and whole chillies. Add turmeric, coriander powder and chilli powder. Fry well, sprinkle water from time to time. When well fried add the ground ginger and garlic, meat and fry for 5 minutes. Add potatoes and salt with warm water. Cook gently till meat is tender. Add tamarind water, bring to boil and remove from fire.