Piyush is an exotic drink not only by name that means "Amrit" or the drink of the God's but by taste too. Piyush is a Maharashtrians love. Some may find it a tad too sweet if authentic recipe is followed but one can adjust it to the sweetness of ones choice. This is a summer cooler popular on Prakash's menu too. I don't know their recipe but as promised before here is mine.
1 cup Kesari Shrikhand
1 generous pinch nutmeg powder
3/4 glass slightly sour butter milk
Put all the ingredients in a blender and run for just a minute. Pour the frothy blend into a tall glass and chill in the refrigerator for an hour before you enjoy it. Adjust sugar as per taste if required.