I tried this too a few weeks back.
I too thought the tandoori flavour was excellent.
However, I did not gel with the mustard oil or the black salt. I think half of it was mental, as I thought both of these ingredients stunk. I'm pretty sure the black salt sulphur smell subsided in cooking, but I could definitely taste the mustard oil, which I did not like.
I will try again and swap mustard oil for veg, and maybe dim down the black salt a little.
Top notch recipe though.