Drain the soaked chana dal from water, grind to a coarse paste along with the green chilies and very little water.
Heat 1 tbsp oil in a pan, when smoking hot, throw in the nigella seeds, allow to splutter.
Add the pumpkin, salt, turmeric powder and red chili powder, fry over a high flame for 5-6 minutes while stirring frequently.
Lower the flame, stir in the chana dal paste and sprinkle in the roasted cumin powder.
Adjust seasonings.
Cook over a low flame, while stirring continuously, till the chana dal paste is incorporated completely into the pumpkin and the mixture comes off the pan easily.
Allow the mixture to cool just sufficiently enough to handle.
Grease a dish with a little oil. Spread the above mixture on the dish, about 6-7mm of thickness. Cut into diamond shape as shown in the picture.
Allow to cool to room temperature.
Heat oil in a pan, fry the dhokas till a gorgeous golden. Keep aside on a kitchen absorbent towel.