Tonight I cooked a Roshney-style curry using pork (left overs from roast) and with the intention of following Az's recipe, although it turns out I wandered from it somewhat due to incompetence. I did use genuine Az recipe red masala sauce frozen into two ice cube chunks and defrosted, hence the odd shapes but in other regards I didn't stick to the recipe because I made some schoolboy errors:
- omitting green peppers entirely
- forgot to add the green chillies at the frying stage, I threw them in after the base sauce was added which didn't work out too well
- added too much base sauce and swamped the dish a bit, leading to an extended simmer to get the consistency right
Still, the flavour was good and it was only ever going to be a work-in-progress as I develop this recipe and work on implementing what I learned at Zaal. I don't post this as a recipe to be followed by others and I don't set out my stall as an expert chef at all - I'm a beginner and happy to admit it, so tips and advice are welcome

Note, the frying of the spices and tomato puree was brief, but the pan was very hot and the characteristic grab-the-back-of-your-throat-and-make-you-cough fumes were almost instantly apparent, hence my rapid application of base sauce.
In particular I'm struggling a bit with getting the onion to have the right texture. Despite only having the briefest of fry before the spices then base sauce were added the onions still came out soft and floppy in the final dish, whereas every BIR dish I'm been served in restaurants with chunks of onion in has firm onions.
Roshney Curry