Finally, prepare the tempering for the tadka dal. In a small pan, heat up the sunflower oil on a high heat.
Once the oil is hot, reduce the flame to low, and add mustard seeds and cumin seeds. After a few seconds, follow these with garlic, dry red chilies, curry leaves, hing (asafoetida).
NOTE: The ingredients need to be added to the hot oil quickly, to ensure nothing burns, but they all cook.
While it is still hot, add the tempering on top of the dal and mix well, adding the chopped cilantro, if desired, as well.
You can let the dal simmer until it is hot and reaches your desired consistency either with the temperint in it, or before adding it.
You can garnish dal tadka with extra cilantro, serve and enjoy!