Prep the Dal: Sort, wash, and drain the chana dal.
Place it in a large bowl, cover with 3 cups / 710 ml of hot water, and let it soak for at least 5 hours.
Once soaked, drain the water completely. 2.
Cook the Dal: For a saucepan, combine the soaked dal, 7 cups (1680 ml) / 1. 75 liters of water, turmeric, coriander, ginger, and 1 tablespoon (15 ml / 0.5 fl oz) of the ghee in a heavy-bottomed pot.
Bring to a boil, then reduce heat to low, cover, and simmer for 1½ hours. For a pressure cooker, combine the same with 5½ cups / 1. 3 liters of water.
Cook under pressure for 25 minutes.
Let the pressure release naturally. 3.
Add the Squash: Once the dal is partially cooked, stir in the bottle gourd pieces and garam masala.
Continue to simmer gently for another 30 minutes, or until the dal is completely soft and the squash is butter-soft.
Stir in the salt and lemon juice. 4. Prepare the Tarka: In a small pan, heat the remaining ghee over medium-high heat.
Once hot, add the cumin seeds and dried red chilies.
Fry until the cumin seeds turn a rich brown.
Add the asafetida and curry leaves, and sizzle for just 1-2 seconds. 5. Temper and Serve: Immediately pour the hot tarka over the cooked dal.
Cover the pot instantly to trap the aromas and let it infuse for 1-2 minutes.
Stir gently and serve hot, ensuring each portion gets a few pieces of the tender squash.