1. Drain and boil the dhal in 500ml unsalted water for 15-20 minutes and mash lightly.
2. Add salt, chillies, turmeric, lemon juice, coriander powder and stir well.
3. Heat the oil and fry onions until golden brown. Add the garlic and stir for a further 1 minute. Stir this "tarka" into the dhal mixture.
4. Allow the dhal to simmer a few minutes to allow the tarka to blend with the dhal.