To Cook Black Lentils - Add the black lentils in a bowl. Wash and soak in water for about 20-30 minutes. Drain the water and cook using one of two methods: (1) Pressure Cooker , or (2) Pot of boiling water. Cook the Dal until soft, but not mushy. Drain the water after cooking the dal.
I typically cook a bunch at once in my pressure cooker, cool, and freeze leftover plain cooked black lentils in a freezer bag. Then simply thaw and use to make this soup for a quick meal when needed.
Asafetida (hing) - Although this powder is naturally gluten-free, it is almost always manufactured by diluting it significantly with wheat flour. There are some brands you can find that make it with rice flour. If you are uncertain and have a gluten-free diet, then you can easily omit this ingredient.
Curried Black Lentil (Urad Dal) Soup https://vegetariangastronomy.com/curried-black-lentil-urad-soup/