First wash the lentils thoroughly in a bowl, make sure the water runs clear before cooking.
You can choose either to cook the lentils in the pressure cooker to in a sauce pan. Both sets of instructions are below. Choose the one which you find more convenient.
Cooking in pressure cooker
Next add the water, both lentils, ginger, garlic, turmeric, green chillies, salt, red chilli powder and ground coriander to a pressure cooker. Stir through, cover with the lid and bring the heat up on the hob up the highest setting and wait for the pressure to build up and the steam to start hissing from the pressure cooker.
Once the steam starts to hiss from the pressure cooker, turn the heat down slightly and let the lentils cook for 7 minutes.
Allow the steam to release from the pressure cooker, remove the lid and stir through the lentils. If they are quite dry, you can add more water at this point.
Cooking in saucepan
Next add the water, both lentils, ginger, garlic, turmeric, green chillies, salt, red chilli powder and ground coriander to the sauce pan. Stir through, cover with the lid and bring the heat on the hob to medium heat and let the lentils cook for around 20 minutes, until soft.
Keep stirring at intervals and add more water if the lentils are starting to dry out.
Tarka
Whilst the lentils are cooking, start on the tarka. In a separate pan, add the oil, onion, tomato and cumin seeds (curry leaves optional). Cook on medium heat until the onions starts to lightly brown, this should take around 4 minutes.
Add the tarka to the daal and stir through.
Garnish with fresh coriander and lemon juice and serve with basmati rice or chapatis or paratha
Video
Notes
You can choose to use 3 tablespoons of butter or ghee instead of oil when making the tarka. This will a lovely taste to the daal.
If you want your daal to be runnier, just add more water in to your preference.