Hi,
My local takeaway has a window right next to where the chef is cooking,I have studied him closely
and he prepares ctm in exactly this way, oil about a ladle (3 Tbl spoons) looks coloured probably
re-using old oil, garlic puree,ginger puree equal amounts fries at high heat until brown and sets fire to oil, then the mystery begins from a tub (ice cream carton) comes a ladle of a red stiffish paste
fried for a few minutes adds chiken tikka then 2 ladles of very thin greenish yellow gravy thats simmering on the cooker, fries for a futher minute or two adds salt (a lot about a dessert spoon full) a dessert spoon of ground almonds then again sets fire to oil, pours into a tray sprinkles fresh coriander adds a tablespoon of evaporated milk and smiles . He knows i don't know whats in the red mixture.Will keep you informed I am sure he wants to tell me

Steve e