Wash the red lentils (masoor dhal) and add water to it. Now cut a tomato and add to the dhal and water along with salt, chilli powder and turmeric powder. Let it soak.
Meanwhile, chop onions, green chillis, ginger and keep ready coriander powder and aseofotida powder.
Heat the pan, add oil, cumin and mustard seeds. Let them start splittering. Then add g chilli and ginger pieces, wait for a minute and add the onion. Saute for few mins and then add coriander powder and aseofotida powder and add this whole preparation into the soaking dhal and put it on the stove in a pressure cooker. Leave for 5-6 whistles till it becomes thick yellow liquid and the dhal is done!!