Now add ginger, cumin, mustard seed, cinnamon, cloves, turmeric, cayenne, and paprika. Saute it for a few minutes. To this, add two tbsp of dried tamarind mixed in hot water. Make sure that you work it through a sieve to discard the tamarind seeds.
Allow the chicken to cook for a while for about 45 minute and partially remove the lid during the last 10 minutes or so to thicken the sauce. Make sure that you stir it couple of times while cooking.