Grease a big (dinner plate) flat plate or two small (quarter) plates with some ghee and keep them aside.

Roast sesame seeds on medium heat for 4-5 minutes while stirring them continuously to prevent them from getting burnt. When done, set them aside in a plate.

Heat a pan, add ghee, and then add jaggery. (You can use chikki jaggery instead of the regular one but that'll cause the vadis to harden. So if you are making these vadis for toddlers use regular jaggery. I used regular organic jaggery.)

Cook the jaggery on low flame till it melts and starts to froth. This should take around 2-3 minutes. Keep stirring to ensure that the jaggery doesn't get burnt. Turn off heat when done.

Add roasted sesame seeds, peanuts' powder, and cardamom powder in the jaggery, and mix well.

Transfer the mixture onto the greased plate and flatten it using the bottom of a bowl. (Grease the surface of the bowl using some ghee so that the mixture doesn't stick to it.)

Use a knife to mark the mixture in square shapes. (Just make the markings don't separate the pieces till the mixture sets properly.)

Allow the mixture to set for at least 30-40 minutes.

Cover the plate with another plate and flip it over so that the pieces get transferred onto the other plate.