My fave spice paste - is a goan recipe
In a blender put:
5 cloves garlic
big bit of ginger
3 or 4 chillis (can substiture chilli powder, or combo or chilli & paprika)
big desertspoon tamarind
teaspoon powdered fennel
dry fry the following for 3 mins or so, then grind in pestle & mortar, then throw into the above blender:
6 peppercorns
6 cloves
star anise
cumin seeds
desertspoon poppy seeds
Then, slosh some white wine vinegar in and blend it until paste texture.
meanswhile, chop 2 onions and fry on low heat for 20 mins, with 2 bay leaves and a cinammon stick. They NEED to be cooked this long as this adds flavour. They will go a mid brown colour.
Then, add spice paste and fry with onions on med heat, stirring constantly. You will see some oil some out the spice paste (it seems to seperate, difficult to explain).
Then add chopped chicken or pork. Stir into spice paste. DO NOT brown the meat as it will go tough. Add enough stock to cover.
Put lid on and leave for however long you like - couple of hours - on lowest heat possible. Just before ready to eat turn heat up to medium, add about 10 curry leaves and a spoonful of jaggery (or brown sugar).
Very nice - can be made as hot or mild as you like with addition/removal of chillis.