Hi Missy,
I know your email was directed at CA but thought I would let you know how it is made here in Aus in the shop to give you some other ideas.
1. Flash fry cubed onion and capsicum, this is just a quick deep fry
2. Heat pan, add oil and heat
3. Add pinch chili powder, pinch methi, pinch black pepper powder
4. Add the flash fried onion and capsicum, quick stir till nice capsicum aroma emerges
5. Add pre-cooked chicken with a little of the cooking liquid
6. Add 1.5 - 2.0 chef spoon butter gravy
7. Add little hot water if required to get consistency, should be quite thick
8. Add 1 chef spoon cream, mix through, simmer couple of mins at most
9. Remove, package, garnish with fresh chopped coriander
The Butter Gravy is nothing more then the BIR gravy base (no veg except onion in it though), except that it has ground cashews added to it, they are soaked in hot water then pureed into a smooth paste and the spicing is different too with cumin being the biggest ingredient. There is sugar in the Butter Gravy hence no need to put it in the final dish at the restaurant, same too with some tomato ketchup. We do add additional tomato ketchup when making a butter chicken though.
Cheers,
Mark