This just may be my new favorite food. The first time I ever had chicken biryani was about 5 years ago, at Sansar in Livermore, CA. I loved it and returned often (this also happens to be the only Indian restaurant to ever give me authentic amounts of heat in my food). And since then, I have searched high and low for a restaurant that made chicken biryani even half as good as Sansars, until now that is. Because now I can make it at home. Granted this did take me 8 hours to make. But it also made enough to feed a family of eight, so we had plenty of leftovers to make my time worthwhile. It took a while to develop this recipe, since there are so few recipes online which seem remotely correct, but here it goes.
The day before, I marinated the chicken and let it sit overnight.
On the day of, I first made rice, steamed with lots of whole and ground spices.
Then the chicken masala was cooked, with the chicken and all its marinade added to a pan of onions and spices, then simmered with tomatoes and yogurt for a while.
Then the chicken masala, and the rice were layered into a large oven-safe vessel and baked for 30 minutes to allow flavors to meld.