Soak the split white lentils for 2 hours. Drain, rinse and set aside for now.
Press saute, add oil and once the oil is hot, add cumin seeds and mustard seeds. When the cumin seeds brown, add the onion and green chili and saute for 8-10 minutes, or until the onions begin to brown.
Add the garlic, stir, then add the lentils, water, spices and mix well.
Secure the lid, close the pressure valve and cook at high pressure for 4 minutes.
Naturally release pressure (takes approx. 15 minutes).
Garnish with chopped cilantro, onion and green chilies and lemon.