Taj Mahal is white, and gajar halwa is red. The rare dessert is in fact sighted only at this pre-partition mithai shop in Old Delhi’s Chitli Qabar Chowk. This rainy afternoon, the sky is gloomy grey, the cold air is smoggy, but fragrant steam is rising enthusiastically from the halwa platter atop the shop counter. Priced at 800 per kg, …