Tiger Shrimp with Onions

The word for “shrimp” in Bengali is chingri, so this is a chingri jhal, or stir-fry with shrimp. The base of the dish is mustard oil flavored with whole spices as well as with ginger and garlic. As in many Bangladeshi dishes, this flavored oil is used to stir-fry a generous pile of finely chopped onion. The shrimp go in once the onion has cooked to a softened, aromatic, slightly sweet mass. When cooked, they look like pink jewels dotting the onion. The whole dish takes about t