This is taken from the book '100 Best Balti Curries (Authentic dishes from the Baltihouses)', which by the way is very interesting book, I might revisit some of these recipes now I have discovered the secret of leaving a curry before eating it? ?

. I think its out of print now but it regularly crops up on ebay now and then.
Anyway, this book uses the correct formula of first making up a base balti sauce that is used in almost all the recipes, it gives 2 variants everday and rolls royce (Id want the rolls royce everyday but thats another matter? ;D). These 2 base sauces dont differ greatly from what we know, only ingredient I see in them that arent in our base sauces are dried methi leaves, however they do give a 3rd way to produce the base sauce which is combining the pre cooking meat stage with the making of the sauce, they give 2 variants one for lamb and mutton, the other for chicken.
Here is the one for chicken:
Pre-cooking chicken and making Balti sauce3lb chicken
3 onions, chopped
2 tomatoes, chopped
1 TBSP salt
2 inch fresh ginger, peeled and grated
6 large garlic cloves, crushed
2.5 TSP Balti spice mix (Just use bruce edwards restaurant masala, they arent too different)
1 TSP turmeric
4 cloves
2 inch cinnamon
1 black or 4 green cardamoms, broken open (dont know what this is about, black and green cardamoms are not in anyway interchangeable in my book!)
2 black peppercorns
1 TBSP fresh chopped coriander
2 TBSP veg oil
Lob everything except the coriander and oil into a pan, add 300ml water, bring to boil, cover and simmer for 30-35 minutes
The chicken should be ready at this point so remove
Add the coriander and oil and return to the boil, stir for 2 minutes
Fish out the cinnamon and cardamom and blend the mixture.
The recipe for lamb is a little different and involves more spices, oil and methi for some reason.
I havent tried this but I bet it produces a decent base as it is cooking with the meat, they talk about using not just chicken breast but portions and meat coming off thebone so this sounds like it will impart a similar flavour to Pete's chicken jelly.