A comforting South Indian lentil curry featuring tender red lentils and diced banana stem in a tangy tamarind broth. Tempered spices, curry leaves, and a hint of jaggery give it an earthy, sour, and mildly sweet profile.
Combine 200 g masoor dal and 375 ml water in a large, heavy saucepan. Simmer for roughly 25 minutes until thoroughly softened, then drain well and set aside.
Strip off the fibrous outer layers of 1 cup banana stem and slice the core into thick rounds, pulling away any loose fibres as you go. Drop the pieces into water or buttermilk to prevent discolouration, then rinse thoroughly and chop into fine dice.
Heat 27 g vegetable oil in a medium saucepan over medium heat. Tip in 4.3 g urad dal and fry for 1 to 2 minutes until golden, then add the tempering seeds and fry for about 1 minute until browned.
Turn the heat down to low, add the chilli for tempering, and cook for 2 minutes until it turns a shade darker. Stir in 1.8–2 g curry leaf and the asafoetida, then tip in the diced banana stem and sauté for 1 minute.
Add the ground turmeric, 62.4 g tamarind extract, 2 tsp jaggery or soft brown sugar, and salt to taste. Simmer for about 5 minutes until the banana stem is tender.
Fold the cooked masoor dal into the pan and simmer gently for 2 to 3 minutes until heated through.
Whisk 1 part yogurt with 2 parts water (40 g yogurt plus 80 g water for 120 g buttermilk); a little thicker and more sour than true buttermilk, so loosen with extra water.
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.
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.