Take a bowl and add semolina, maize flour and cooked moong dal. Dal should be thick.
Add rest of the ingredients in the bowl like onion, red chilli powder, garam masala, dry mango powder, green chilli & coriander leaves.
Mix all the ingredients with hand to knead a soft dough WITHOUT ADDING WATER. Note here, we didn't need to add water and mixture clubbed into dough due to the water/moisture present in the cooked dal.
After dough is kneaded, apply 1 tsp oil on dough & put on rest for 15 minutes.
Now take a small ball size mixture from the dough, flatten it into discs between your palms by pressing gently.
Apply some oil on non stick tawa & arrange discs on the tawa. Let them cook on low flame.
After couple of minutes, drop very little oil on discs & turn their sides.
Press the discs wherever necessary & let them turn golden brown from both sides.
Take them out on paper nepkin.
Your kawab are ready. Serve hot with tomato ketchup and/or chilli sauce or with any dip of your choice.
Video
Notes
While you are kneading the dough, don't add water and there's every possibility that your dough will make out even without water. But in case mixture is not coming together & is little dry, add few spoons of water to make a dough. However you can add few spoons of dal or oil to make a dough.
Contrary to what has been said just above, if dough is loose even without adding water, add few spoon/s of semolina or maize flour to make the mixture bindable.