For tempering heat the ghee in a small pan on stove, add all ingredients when the ghee is hot. Fry till fragrant and garlic becomes golden. Alternatively you can do this Tempering in the first step directly in the Instant pot. It’s just a preference.
If using Raw tamarind, then soak it in hot water and get the extract.
Sambar powder is easily available in Indian groceries.
You can also use other veggies like Okra, Moringa pods, pumpkin, Shallots, Radish etc
Serve this Sambar as a Vegetable soup or with Rice, traditional breakfasts like Dosa, Idli or Upma.
Yellow lentils can be replace with red lentils.