Soak the chillies in hot water for 30 mins to overnight
Soak the tamarind for 30 mins
Marinate the chicken with the lime juice and salt and keep aside
In a food processor add the chillies, tamarind, ginger, garlic, cumin seeds, peppercorns,, cinnamon, cardamoms, cloves & turmeric
Add water a little at a time till smooth
In a sauce pan add some oil and add the potatoes and cook till half done and keep aside
Add the onion and green chillies
Add the tomatoes, cover and cook till the tomatoes are mushy
Add the ground masala and cook
Remove and keep aside
Add the chicken in and allow to brown on both sides
Add the onion, tomato and ground paste back in
Add the stock cube and 1 cup of water
Add the potatoes back in, and salt to taste and cook till the chicken is tender
Add the vinegar cook for a few more minutes and it’s ready to serve