Bring 500 ml of water to a boil in a large saucepan, then stir in 50.4 g masoor dal. Lower the heat and simmer gently for about 20 minutes until the lentils are completely tender. Drain well, return them to the pot, and crush them thoroughly with a wooden spatula.
Warm 26.4 g ghee over medium heat in a frying pan. Add the whole spices for frying and cook, stirring frequently, for roughly 2 minutes until the chillies darken slightly. Remove from the heat and set aside to cool.
Put the cooled spices and 600 g sliced onion into a small blender and grind to a smooth paste. Add 264 g tamarind extract, the ground turmeric, and salt to taste, then stir this mixture into the mashed dal. Pour in 750 ml of water, add 0.5 teaspoon jaggery, and simmer over medium heat for 5 minutes.
Heat 13.5 g vegetable oil in a small pan over medium heat. Tip in the tempering spices and 2.5 g curry leaf, then fry for about 2 minutes until the seeds pop and darken.
Pour the hot tempering immediately over the simmering dal and seal with a lid to trap the aromas. Cook gently for another 2 minutes, then take off the heat and stir in 100 g coriander leaf before serving.
Use 120% of the weight; melt gently over low heat to avoid burning the milk solids, which will yield a softer, creamier richness rather than a nutty aroma.
Use 80% of the weight, finely shredded and browned slowly with a pinch of asafoetida. Replicates the bulk and natural sweetness in gravies without allium.
Steep a tiny pinch (0.1 g per 2 g turmeric) in 2 tbsp warm water; use to match the rich golden hue. Contributes an aristocratic, honeyed floral flavour rather than earthy bitterness.
Use 80% of the weight. Granulated sugar is sweeter by weight, but gives a cleaner, one-dimensional sweetness that lacks jaggery's caramel, molasses depth.
Soak and blend into a paste; use 100% to 120% of the weight. Adds rich, natural, fruity sweetness with complex, dark molasses notes that thicken the gravy.
Use the same weight. The seeds are smaller and hotter; fry in hot oil until they pop, about 20–30 seconds, and reduce the heat if they darken too fast. The dish will be a little sharper.
Use 70% of the weight of whole seed, added with the other ground spices rather than fried whole. You lose the popping texture and the heat comes through more evenly.