Peel the lotus stem and wash thoroughly to get rid of any traces of mud . Slice into 1/2 inch rounds
Beat or whisk the yogurt till its smooth and let it warm up to room temperature.
Heat oil in a pot and add the cumin seeds followed by the whole spices. Saute till they brown and get fragrant.
Add chopped lotus stem slices and saute for 5 minutes
Add water, followed by fennel, ginger and coriander powders. Boil it for 10 mins, we want the lotus stem to cook but stay slightly firm
Add the yogurt slowly while continuing to stir. Sprinklepowdered garam masala on top and a couple of slit green chillies if you like to add a little heat.
The gravy should be thick. If it is watery, you can add a couple of tsps of rice flour and let it boil for a few minutes
Serve hot with rice or cauli rice