Moong or masoor dal cooked with raw green mango pieces providing a natural sourness — the summer dal of Bengal that uses the season's abundant raw mangoes as a souring agent instead of tamarind. Light, refreshing and deeply tangy.
Ingredients
1 cup moong dal (split yellow moong) — dry roasted then washed
1 medium raw green mango — peeled and cut into 3 cm cubes (choose a sour, fibrous variety)
Dry roast the moong dal: Roast moong dal in a dry pan 3 minutes until lightly golden. Wash thoroughly.
Cook dal with raw mango: Place roasted washed dal, raw mango cubes, water and turmeric in a pressure cooker. Cook on high until first whistle then medium for 3 whistles. The raw mango will cook completely and dissolve partially into the dal, releasing its sourness throughout.
Open and mash: Open after pressure releases. Stir vigorously. The mango pieces will have softened — some will be intact, some will have dissolved. Mash partially. The dal should taste distinctly sour from the mango.
Taste the sourness: If the mango was very sour, the dal may already be quite tangy. If not sour enough, add a small additional piece of raw mango and simmer 5 more minutes uncovered.
Add sugar and salt: Add sugar and salt. The sugar balances the mango sourness. Stir.
Heat ghee for tempering: Heat 2 tbsp ghee in a small pan. Add panch phoron — all five seeds crackle. Add dried red chilli and asafoetida.
Pour tempering into dal: Pour the hot ghee tempering into the sour mango dal. Stir well.
Simmer 3 minutes.
Serve: The kacha aam dal should be flowing and distinctly sour-sweet. Serve over steamed white rice.
Note: Kacha Aam Dal (kacha aam = raw mango, dal = lentils) is the summer seasonal dal of Bengal — made specifically during the April to June months when raw green mangoes are abundant and at their most sour. Using seasonal ingredients as the souring agent (rather than tamarind year-round) is a distinctly Bengali seasonal cooking approach. The tartness of raw mango provides a fresher, fruitier sourness than tamarind.