In a bowl take warm water add 1/2 tsp of salt and turmeric powder mix well. Then put cauliflower florets into it. Leave it for 10-15 mins. Because turmeric and salt remove the dust, chemical and insects from florets therefore ..
After remove and wash thoroughly 2 to 3 times under running water.
Now heat the Ghee or oil in pan and add cumin seeds and mustard seeds. While they popping , add hing and chopped Onion's.
Fry till they turns translucent. Next add gobi/ cauliflower florets into it. Mix well on medium flame.
Cover and cook 2-3 mins on low flame while stirring occasionally.
Now add Red chilli powder, cumin powder, coriander powder, salt to taste, Garam masala mix well .
Soon add soaked, rinsed and drained arhar dal into it. stir well.
Further add water as needed , Cover and boil until dal and florets are well cooked. stirring occasionally.
Lastly add chopped coriander leaves. And Mix well.
Now cauliflower dal Curry is ready to serve.