Mix all the lentils together and rinse several times untilthe water runs clear. Transfer to a large bowl, cover with water and soak forat least an hour.
Place roughly chopped tomato, garlic and ginger paste in themixing bowl and chop 5 sec/ speed 7.
Drain and add the soaked lentils to the mixing bowl. Add 3 cups of water, chillies, turmeric andpinch of asafoetida. Cook 30 mins / 100 deg/ reverse/ speed 1.
Add salt to taste and dried mango pieces if using and cookfor a further 30 mins / 100 deg / reverse / speed 1.
Temper the tardka and add to the dahl. Taste for salt if more souring agent isneeded, add lemon juice.
Cover the mixing bowl with the lid, MC on and cook foran additional 5 mins/ 100 deg/ reverse / speed 1. (If dahl is too thick, add some boiling waterto loosen it.)
Garnish with coriander leaves and serve hot.