First a fall Fry the Red Onions in oil utill it gets Golden Brown & Crispy, stir it every now and then, Boil the water on another stove to cook rice.
Onions are ready so take it out in Kitchen Napkin so it can absorb the oil.
In the same oil add Carrots and Potatoes and fry it just 50%, it is also ready so take it out.
In the hot Bubbling water add 1 tb tsp of Salt and 500 Gms of Rice.
In 3-4 Tb tsp Oil add Cumin Seeds and Garlic & Ginger Paste, now turn the heat off and add Fried Vegetables in it.
Now add Salt accourding to taste, Sugar, Red Chili Powder, Biryani Masala and 150 Gms of Curd ( Yogurt ) and give it a Nice stir.
Now add Crispy Onions in it save some for garnishing and mix it very well, now add some fresh Coriander Leaves.
Add 80% Cooked rice to the first Layed and spread it equally, Now add 100% cooked rice in the final layer and again spread it equally.
Now add some fresh coriander leaves, 1-2 tsp Ghee, 1 Glass saffron milk and finally Cover it and cook it for 15 Minutes at very-very low heat.
Now the very special and delicious Veg Biryani is ready to serve Garnish it with some coriander leaves and Crispy Onions.