Dahi (Perfect yogurt)

Place a nonstick saucepan over high heat and add the milk. Bring to a boil.
Remove from the heat and set aside to cool.

When the milk has cooled to 114°F/45°C or is lukewarm, add the yogurt and stir gently with a spoon or whisk.

Transfer to an earthenware pot and set aside in a warm place overnight until the mixture thickens.
Do not jostle the pot. In the winter or at higher altitudes, wrap the pot in a blanket or towel to keep it warm.

When the yogurt has thickened, transfer to the refrigerator.
Remember to save 1 teaspoon of the yogurt to make the next batch.