I was talking to one chef and he said that potatoes are precooked seperately to the carrots, brocolli, cabbage.
They aren't cooked in water either
They are done in oil, tomato puree, spice mix, garlic ginger puree and salt
The potatoes effectively cook in their own steam
He showed me the pre cooked potato plastic container
Like so many other BIR things, there was about a half inch of red oil with it
Bombay potato is one of my favourites, too
I can't do it anywhere near as well as a restaurant