Hi Mark J
This is how they cook authentic Indian curry.(the above recipe ) but of course with a slight variation i.e frying the onion,garlic ,ginger, spices, tomato and then frying the chicken and adding the rest of the ingredients.
The only difference in this recipe is they remove the chicken after 30 minutes and then they puree The rest of the ingredients.
Instead of boiling the gravy ingredients separately and then boiling the chicken separately ,they are doing It in one pot together .Very good idea.
So in basic it is boiled onion curry gravy with the chicken boiled in it with the rest of the ingredients.
Thanks
ghanna