Heat the milk in a saucepan over medium heat until it starts to boil.
Stir occasionally to prevent the milk from sticking to the bottom of the pan.
Once the milk has boiled, remove it from the heat and let it cool to lukewarm temperature (about 110°F or 43°C).
In a small bowl, mix the plain yogurt with a little bit of the cooled milk until smooth.
Stir this yogurt mixture back into the rest of the milk.
Pour the milk into a clean container with a lid.
Cover the container with a lid or a clean cloth.
Let it sit in a warm place for about 6-8 hours or overnight to ferment. The yogurt will thicken and develop a tangy flavor.
Once the yogurt has set, stir in sugar to taste.
You can also add cardamom powder and saffron strands for extra flavor.
Refrigerate the Juju Dhau for a few hours before serving.
Enjoy your meal!