I remember eating a preparation like this in a restaurant around 10 years back. In last 10 years this recipe is a must, if any vegetarian friends are coming home, as a starter. Goes well with drinks, is very light and can be made in 5 minutes if mushrooms are cleaned and kept.
I also use it as a side dish with Pan Fried Basa or Grilled Chicken
This recipe was also featured by a start-up in Bangalore that would measure all the ingredients in the exact quantity and send it to buyer with a step wise recipe. Interesting concept