Add green chilli, garlic cloves, and cumin seeds in a mixture jar. Crush it into a coarse paste. Keep it aside.
Now in a mixing bowl, add chopped coriander leaves, besan, rice flour, rava, cumin seeds, ajwain, white sesame seeds, hing, turmeric powder, red chilli powder, salt, and garam masala. Mix well.
Add water gradually and bind the mixture together. Do not add more water to the mixture.
Now in a deep vessel, add 3 cups of water and boil it. Now place the hole plate on it and grease the plate with oil.
Then place the vadi dough on it and spread it with slightly wet hand.
Sprinkle some sesame seeds and press them slightly.
Now cover and steam vadi on high flame for 15 minutes or till the toothpick comes out clean.
Then cool down the cooked vadi mixture and cut it into square pieces.
Heat oil on medium flame and fry vadi pieces till it slightly golden brown from both sides.
Serve crispy kothimbir vadi with chutney or tomato sauce.