To begin making the Hyderabadi Khatti Dal Recipe, first clean and wash the dal well under running water. 

In a pressure cooker, add washed dal, garlic, ginger, turmeric, red chili powder, green chili, tomatoes salt and 2 cups of water. Cover the pressure cooker and cook until you hear a couple of whistles. After a couple of whistles, turn the heat to low and cook for 3 minutes approximately and turn off the heat. 

Allow the pressure in the cooker release naturally. Once the pressure has released, open the cooker. 

When the dal is done, whisk the dal well to make it smooth. Add tamarind water to the dal and bring the Khatti dal to a brisk boil. Once it comes to a boil, turn the heat to low and set the dal to simmer.

Next we will prepare the seasoning.

In a small tadka pan heat oil in medium heat.  Add the mustard seeds, cumin seeds and allow it to crackle. Once it Add garlic and fry until it starts getting golden brown.  Add curry leaves and red chilies, fry for another few seconds.

Pour the tadka over the dal and simmer for 4 to 5 minutes. Once done, turn off the heat and the Hyderabadi Khatti Dal recipe is ready. Check the salt and adjust to suit your taste. Pour the dal into a serving bowl and garnish with chopped coriander leaves and serve warm.

Serve the Hyderabadi Khatti Dal along with Steamed Rice, Kathirikai Roast (brinjal roast) and papad.