Biryani is a South Asian mixed rice dish with its origins among the Muslims of the Indian subcontinent.
Biryani is made with spices, rice and meat (chicken, mutton, beef, prawn, or fish) or vegetables. Sometimes egg is also added.
Depending on the region and the condiments available and popular in that region, there are different varieties of biryani. The variety often takes the name of the region (for example, Sindhi biryani developed in the Sindh region of what is now Pakistan, Hyderabadi biryani developed in the city of Hyderabad in South India etc.).
In vegetable biryani you may use any vegetables of your choice for example potatoes, carrots, cauliflower, green peas, beans etc.
It is a four steps cooking - first step requires frying of onions, second step is cooking of vegetables in spices and yogurt (dahi), third step requires cooking of rice (or basmati rice) with aromatic whole spices and final step requires making layers of cooked rice, cooked vegetables and fried onions in a big pot and then cook them together.
Vegetable Biryani requires lots of patience and time but the outcome is super delicious, so it's worth in all senses. It's a perfect dish for any occasion.
It's a main dish, can be served in lunch or dinner and goes very well with dahi (yogurt/curd) chutney or any raita of your choice.