To layer the Biryani, preheat your oven to 300F.
In a large pan, add some of the curry sauce to the bottom.
Next use a large spatula and spread a thin layer of rice on top. Divide the remaining rice in three sections for the layers.*
Next, scatter your chicken Biryani curry over the rice making sure to add a couple chicken pieces and potatoes followed by the second rice layer.
Drizzle yellow food coloring, some mint and cilantro.
Next add the second layer of chicken curry followed by the third layer of rice. Repeat with a drizzle of yellow food coloring and some mint cilantro, add the third layer of chicken curry followed by the final layer of rice. Repeat with food color and mint/cilantro.
Drizzle rose water for fragrance and add lemon slices on the rice. You can also add crushed fried onion if you have it.
To give "dum" in oven, take two large pieces of foil and cover the pan by overlapping the foil. Make sure to crimp the pieces of foil around the edges of the pan. Take your time with crimping. The pan should be COMPLETELY sealed!
Place the pan in the center of your oven and allow it to stay in "dum" for 50 mins to 1 hour. The oven will evenly distribute heat throughout the Biryani.
Once the Biryani is done, carefully remove the foil. Using a large spatula, lift the rice from the bottom and very gently shake it. Shaking will mix the curry with the rice without breaking the grains. DO NOT use a fork.
Once the biryani is gently mixed/shaken through, cover it with the foil again and let it sit on your countertop for at least 15-30 mins before serving. The flavors need a chance to settle so make sure you give it the resting time it needs and deserves.