Place a metal strainer over a bowl. Line it with clean kitchen towel.
Measure 1 cup of curd and pour over the cloth. Gather the ends and hand over the sink. I tied over my tap.
After minium 1 hour, gently squeeze of excess water. Or you may choose to hang for longer.
You have thick hung curd now to use in place of sour cream.
Run the knife along the avocado until you reach the seed. Refer this video to see how.
Take out the seed. Scoop the avocado.Place it in blender with roughly chopped coriander leaves.
Add green chilli, lemon juice and salt to it. Along with hung curd.
Blend well smoothly. Wipe the blender walls in between twice or thrice for even smoothness.
Transfer to serving bowl.