Add 4 tbsp yoghurt, little salt and besan,onion, ginger in a bowl and make a smooth paste using a little water.

Add it to a pan, and cook for 3 to 4 mins till it thickens.

Grease a plate and spread the mixture to cool.

Once cooled cut it in small pieces.

Heat oil in a fry pan add mustard seeds to splutter it, add a pinch of Hing in it.