Daal makhani was invented at Moti Mahal in Old Delhi in the 1940s — the same restaurant credited with popularising tandoori chicken and butter chicken. The genius of the dish is in its simplicity: whole urad lentils, slow-cooked with tomato, aromatics, butter, and cream until the lentils lose their edges and the gravy becomes luxuriously silky. The longer it cooks, the better it gets. In restaurants, it simmers for 24 hours. At home, 4 hours is transformative.