Sort and clean any grit in the dal. Rinse well. A friend, Lilani who is a fantastic gourmet chef, suggested washing and rinsing through a strainer so that any little bits of grit get washed away. But make sure you sort through the dal so you don't have any tiny stones that can crack someone's tooth!
Ina deep saucepan or cooking pot, add the dal, chopped garlic, fresh chopped ginger, whole Serrano chili or a whole dried red chili, turmeric powder, and salt to taste.
Add water and boil until it resembles a thick soup.
Stir every 15 minutes. Initially, the scum(froth) will rise to the top, you can remove it with a spoon. Half cover the pot with a lid so that some steam escapes and the dal water does not overflow.
Cooking time will vary from 45 minutes to 3 hours depending on the size and type of lentil.
Set aside and use any of the following ways to temper the dals.