Rinse and grate the zucchini with the peel on.
Heat a pan over medium heat and add the oil. Once the oil is hot, add the mustard seeds, cumin seeds, urad dal, channa dal, and the whole dried red chili.
Allow the mustard seeds to splutter and add the hing (asafoetida) to the pan.
Toss in the curry leaves and chopped green chilies. Stir.
Add the zucchini to the pan and stir well.Add 1/2 tsp salt over the zucchini.
Cook the zucchini mixture until it becomes soft and all the water is absorbed.
Once the zucchini has softened and the water has evaporated, turn off the heat. Allow the mixture to cool for approximately 5 minutes.
In a separate bowl, take 3/4 cup of yogurt. Add the cooled zucchini mixture to the yogurt and mix well. Add 1/2 tsp black salt. Add the chopped cilantro to the raita.