Add butter to pan, when the butter is hot, add cashew and roast till they are golden brown and keep aside

In the same pan, add beetroot. Saute till the raw smell goes, for about 3-5 minutes

Add milk and allow it to boil in medium flame. Mix well and cook till milk is absorbed fully. It took 7-10 mins for me

Add brown sugar and continue cooking till sugar dissolves completely

Add condensed milk and cook till moisture is aborbed and halwa consistency is reached