guys why not go the whole way and just do the whole curry in the slow cooker with no base , but instead:
1) make a onion puree with garlic and ginger paste also
2) make a carrot puree
3) blend some tomatoes to a paste
4) add all this to your slow cooker
5) add tom puree and lots of oil , and your prefered spices and also whole spices, salt etc
6) add water
7) add meat, garam masalla etc
then leave for 10 hours to cook, and remove whole spices.
the end result is a great curry with a restaurant style sauce. Its all to do with cooking the meat in the sauce.
To be honest i am getting better results doing this style, although i do still make bir style curry for speed.
For a really tasty curry a slow cooker is your friend
