The biriyani is not good. It's too dry. The chiken was too bland and dry. Masala didn't even enter the chicken. I think chiken is only fried that's why this happened.
And please don't call it mutton kosha. The gravy is too watery.
Mutton er jhol would be better term for that dish.
Note to owner: make the chicken and the biriyani more juicy. Your other dishes are good. Bit disappointed in the biriyani.