To a sauce pan add 1 liter milk. Stir and boil for a minute. Switch off and let it rest for 2-3 minutes.
To a small bowl add 2 tablespoon vinegar, 2 tablespoon water, mix it well and set aside.
Now add vinegar water solution little by little and stir gently. Now the flame is off, this helps to slowly curdle milk and the chenna is so soft.
Now whey water(green liquid) and chenna(white solid) separates.
Now it is curdled completely. Switch off.
Transfer this to a cloth placed on a strainer. Keep a bowl underneath to collect the whey water. You can use this for kneading chapathi dough or for curdling milk again.
Rinse it with water well.
Squeeze excess water.
Roll and place it on the strainer. Keep 2 bowls on it. Do not keep heavy weight. Set aside for 10 minutes.
Now open, moisture should be there, it should not be dry.
Transfer the prepared chenna to a wide plate.
Knead it well using your palm like shown. Knead until the texture changes smooth and soft.
Add ⅓ cup powdered sugar, ¼ teaspoon cardamom powder and 5 strands saffron.
Mix well and gather to form a dough like this.
Keep a pan in low flame and add it to the pan.
Keep cooking in low flame.
Cook for 3-5 minutes not more than that. If you cook longer it may become hard and will crumble. Switch off and remove from flame.
Transfer to a plate. Pinch a small portion.
Make small balls, flatten it slightly.
Garnish with chopped pistachio and saffron strands.
Sandesh is ready!