Place 200 g toor dal, 12 g ginger, the spices for boiling the dal, and 1 litre of water into a pressure cooker. Seal and cook under pressure for 15 minutes (or simmer in a heavy, covered saucepan for 25 minutes until completely tender). Leave to cool, then drain off the excess cooking liquid and transfer the dal to a clean saucepan.
Warm 13.2 g ghee in a small frying pan set over medium heat. Tip in the tempering spice and sizzle for 30 seconds until aromatic.
Pour the hot spiced ghee over the cooked dal and crush with a potato masher or wooden spoon until the mixture is smooth.
Place the saucepan over medium-low heat, stir in salt to taste, and let it simmer for roughly 10 minutes until thick and spoonable before serving.
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 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.