Heat oil in a pan. Add the cumin seeds, fenugreek seeds, carom seeds, nigella seeds, dry red chilies, and bay leaf. Saute for 30 seconds.
Next, add the onions, potatoes, and beans. Let them cook for 1-2 minutes.
Add the spinach next and mix well. Let the mixture cook for 2 minutes.
Add the tomatoes next and let them cook for 30-40 seconds.
Add the powdered spices and salt and mix well.
Next, add Kasundi and mix well. Let it cook for a few seconds.
Serve hot as a delicious side dish to your meals.