In a blender take 2 cups curd, mint leaves, ginger, and chaas masala. grind it.
Take out into mixing bowl, add water to it. and blend to thick frothy later on top.
Now place a small cup in the center and keep 1 piece of red-hot charcoal.
Add in ¼ tsp cumin, pinch of thing, and pour ¼ tsp ghee.
Cover with lid and allow to rest for 1-2 minutes, or till aroma is infused into chaas.
Serve masala lassi with few ice cubes garnished with few mint leaves.