Have just made your curry PR. Very straightforward. Rather than getting the food processor out..hate cleaning the thing...I added th e onion mixture to the tomatoes and used a hand blender and that worked fine.
A couple of tweaks to the recipe...I added some salt. Dont use a lot in my cooking but find you get a more 'authentic' taste with adding some salt, maybe 1/2 - 1 teasp. And also some ginger. I bought a piece and then forgot to put it in at the 'garlic' stage so added 1/4 teasp ground ginger to the tomato sauce.
Oh, and I didnt add the red chillies because it tasted surprisingly hot with just the one green chilli. As I say to my son, its not an exact science...
Looks good. Just waiting to see how it tastes with rice, naan and M&S onion bhajis on the side............