Boil the lentils along with chopped tomatoes , turmeric powder and salt in a pressure cooker. Pressure cook for 2-3 whistles on a low flame.
2-3 medium tomatoes, ½ tsp. turmeric powder, salt as per taste
Mash the lentils using a potato masher or mathni.
In a tadka pan, heat oil and add cumin seeds on a high flame. Let it splutter. Add the ginger-garlic, chopped green chillies and heeng. Mix well.
2 tbsp. sesame oil, 1 tbsp ginger -garlic paste, 1 medium onion, 1 tsp. cumin seeds, pinch heeng
Add red chilli powder, turmeric powder and other spices to the tempering and turn off the heat. Add the tempering to the boiled lentils.Let it simmer for few minutes.
1 tsp. red chili powder, 2 tsp curry powder (use this or below spices), 2 tsp coriander powder, 1 tsp garam masala
You may garnish optionally with chopped coriander leaves. Serve hot with jeera rice or roti.