Having returned from the demo I am somewhat in ore of the way in which they wield their magic in the kitchen. Specifically there for the Bhaji demo I was also trying to keep tabs on everything else.
I can't stress how very happy they were for me to watch and have openly invited me back for anything I want to get involved with. To say I am chuffed is an understatement.
What I did learn is that if you want any accurate information about what is going on you don't talk the brother who runs the business generally, you ask the brother that runs the kitchen. It would seem that some of the info I had been given was not entirely accurate, like the spice mix which was supposed to have the Panch Puran in it, which didn't. (Se IG Spice Mix
http://www.curry-recipes.co.uk/curry/index.php?topic=4442.0 )
Anyway, I am hoping to get back to watch them make the gravy but I can add the following comments on how it is generally done, in their kitchen:
They fry Ginger & Garlic until lightly browned adding in 1 green pepper, spice mix and 1 chopped potato. The onions are added as well as half a lemon as is. A little water is added to prevent anything burning while the onions are softened.
While this is happening they simmer 6 cinnamon sticks, 6 bay leaves, 10 green cardomans and 10 cloves, in water for about 45 mins to infuse the water. The infused water is strained of solids and added to the onions and topped with just enough water to cover the onion whilst it cooks for a further 2 hours or so. It is allowed to cool before it is then blended to a thin sauce like consistency.