Prepare the ingredients for cooking kale by finely chopping kale, ginger and green chilli. If the kale stems are too thick, use only the leaves.
On a medium burner on medium flame, heat oil in a big enough frying pan. Add cumin seeds and sizzle for around 8-10 seconds, taking care not to burn the seeds.
Add ginger and green chilli and sauté to remove the raw smell of ginger.
Add the kale and salt. Mix.
Reduce the flame to low, cover and cook till it is done (approx. 8-12 minutes). Check the doneness of the kale by pressing the stem part with the back/side of a spoon. If it presses or cuts easily, it is done.
Keep mixing in between. The kale will wilt and reduce in size.
Once it is cooked, switch off the gas and remove from heat. Let it cool down.
Meanwhile, put the yoghurt in a big enough bowl and add salt as per taste (be mindful of the salt that has already been added to the kale while cooking).
Whisk the yoghurt to make it smooth. Add a little water if the yoghurt is thick to adjust consistency.
Once the kale has cooled down, add it to the prepared yoghurt, mix and serve.