Pluck the leaves of the spinach and discard the stems
Wash the leaves 2-3 times in tap water and rinse with fresh or mineral water
Add boiling water to the leaves in a bowl and leave for 1-2 minutes
Transfer the leaves into a colander and pour cold water. (This will stop the spinach from cooking further and retain its dark green color)
Let the water drip out
Transfer the Yogurt into a bowl and add the milk
Mix well with the milk to get a good consistency. If required add some water to make it more dilute (one can substitute milk with water completely to make it lighter)
Add salt and pepper to taste
Add the spinach leaves (squeeze the water out completely)