Pick and rinse the lentils well. I have used moong dal. You can also use a mix of arhar dal and moong dal or plain arhar dal.
Take the rinsed lentils in a pressure cooker and add chopped onions and tomatoes also. Mix well. Next add minced garlic, slit green chilies and required salt.
Mix well and pressure cook for 4-6 whistles.
Once the pressure is released mash the dal well and simmer.
In a small pan, add two teaspoons oil and heat it.
Temper with mustard seeds, cumin seeds, dried red chilies. Add chopped garlic and fry until it turns crispy and golden.
Add the tempering to the simmering dal and mix well.
Simmer for a minute and remove from flame. Add finely chopped coriander leaves and mix. Serve lasooni dal hot with rice and ghee.