Start by combining urad dal, salt, turmeric, and water in a medium skillet. Bring it to a boil, then simmer until the lentils are soft and most water evaporates. Stir in lime juice for a tangy finish.
In a large skillet, heat olive oil over medium-high heat. Spread sliced onions evenly and cook, stirring occasionally, until golden brown and sweetly fragrant, about 8–10 minutes.
Warm ghee in a small pan, then add cumin seeds. Once they sputter, toss in dried chiles, red chile powder, and optional asafetida. This fragrant mixture will top the dal.
Layer caramelized onions over the cooked dal, then drizzle the seasoning on top. Don’t stir! This keeps the presentation dramatic and appetizing.