This recipe by Madhur Jaffrey from her cookbook 'An Invitation to Indian Cooking' is North India's most popular dal, and it's eaten with equal relish by toothless toddlers, husky farmers, and effete urban snobs. You can use white urad dal, the salmnon-colored masoor dal, and the large arhar or tovar dal as well. The roasted whole cumin seeds added at the end gives this dish a nice touch. Serve with plain rice and a vegetable for a simple meal. Most meat and chicken dishes go well with this dal.