I would normally cook this in a saucepan , however I have shown this slow cooker version which is handy if you want to go out and leave it cooking but I do prefer using a non stick saucepan which cuts the cooking time down to around and hour and a half. The ingredients I have used may surprise some of you eg. Pataks paste , crispy onions, curry leaves , garlic flakes and whole spices. However this does create an intense flavour closer to home style curries in my opinion. I like to leave it to stand over night or up to two days in the fridge, this really does improve the flavour.
http://youtu.be/iwB4x-Pl_tM