Wash the gram dal (chana dal). Submerge in a large bowl of water and soak overnight.
Make the garlic, ginger and green chilly paste. In this paste, ginger and garlic are in equal amounts and the number of green chillies depends upon how spicy you like your kebabs.
Wash the mutton mince (kheema) under running water, lightly turning the meat around without separating it. Make sure not to overhandle the mince to prevent it from losing its flavour.
Now marinate the kheema with the ginger, garlic and green chilly paste, salt, red chilli powder, chaat masala, dhana jeera powder, turmeric, roasted jeera and garam masala. Refrigerate in an airtight container overnight.
Pressure-cook the marinated kheema and dal, along with the water in which the dal was soaked. Give it two whistles and take off the flame. Let it rest until the pressure cooker lid opens easily.
Now cook the kheema and dal mixture in the cooker over a medium flame, stirring and mashing the dal till it becomes a soft paste and the water dries up. No oil should be added while cooking this mixture, which should be a little moist. Taste the mixture and adjust the seasoning if required. Let it cool down.
Once it cools, the mixture will take on a dough-like consistency. The trick is to get this mixture right - not too moist and not too dry. Add chopped coriander and mix well.
To make the kebabs, grease your palms lightly. Take some mixture in your greased palm and shape into small dumplings or rolls. Dredge the kebab in breadcrumbs, then dip in beaten eggs and again coat in breadcrumbs. For this, put the breadcrumbs in a shallow plate. Beat the eggs in a large mouth bowl till light and fluffy to prevent excess of egg sticking to the kebab rolls.
Refrigerate the raw kebabs for 15 to 20 minutes to firm.
Now heat the oil to fry the kebabs. To check if the oil is hot enough, sprinkle in some breadcrumbs. If the oil crackles and sizzles, it's the right temperature.
Put the kebabs in, a few at a time, ensuring there is enough room to move and turn them around. Fry over a medium flame. If you feel the oil is too hot, reduce the flame or the kebabs will burn and not cook evenly. It is important that the oil is hot enough every time you put a new batch of kebabs in. Test the oil - as explained above - before you fry a new batch.
Serve hot with green chutney.