Add cumin seeds, green chillies, and coconut to a blender.
Add a little water and grind to a smooth paste.
Keep aside.
Heat the coconut oil in a pan.
Add mustard seeds, urad dal, curry leaves, and red chilli. Allow them to splutter.
Add a pinch of asafoetida, mix well, and transfer the tempering to a bowl.
In the same pan, add chopped zucchini, salt, and turmeric powder. Sauté for 2 minutes.
Cover and cook for an additional 2 minutes, until the zucchini is soft.
Add the ground coconut paste and a small amount of water.
Cook for 5 minutes on medium heat until everything blends well.
Turn off the stove and let the mixture cool completely.
Whisk or pulse the thick curd until smooth.
Add the curd to the cooled mixture.
Furthermore, add a little water if needed to adjust consistency.
Add the prepared tempering on top.
Mix gently and serve.