Taken from Charmaine Solomon (she has the most fantastic Asian recipes) this is easy, healthy, comfort food. Great with rice, Indian breads or on its own. Any lentil can be used but red lentils cook quickly and don't need soaking, (if using any other sort soak overnight), I've never tried it with anything other than red lentils.
As one reviewer has commented this isn't a spicy Indian dish and therefore makes a great accompaniment / side dish to othe rspicy curries. Also its a great way of introducing children to Indian food (my 4yr loves it) and I'm happy because its full of protein for her.