Preheat oven to 180 degrees Celsius or 360 degree Fahrenheit.
Grease a thick bottom oven safe pan/ disposable aluminum tray with cooking oil or butter (ghee).
Heat milk and saffron in a small bowl. For convenience, use a microwave. Else, heat milk in a small saucepan and add saffron. Bring it to a boil and remove from heat. Keep aside.
Layer half of the marinated vegetables. Next layer half of the 75% cooked rice.
Sprinkle half of fried onions, cilantro, mint, saffron milk, almonds and cashew nuts.
Layer the remaining marinated vegetables.
Layer the remaining rice and sprinkle the remaining fried onions, cilantro, mint, saffron milk, almonds and cashew nuts.
You can make 2 layers of vegetables and rice or 4 layers. Or more than that (depends on the depth of the container and the quantity you are cooking). But the top most layer should always be that of rice.
Seal the container with an aluminum foil. Bake the biryani for 25-30 minutes.
Serve hot and delicately flavored biryani with 'Dahi Ki Chutney' and 'Mirchi Ka Salad'. Enjoy!