Achaari Salmon (a tangy, spicy, and easy recipe)

Very often, in North America and Western Europe, I have found that while food from Northern India (and to a much lesser extent, dosas, idlis, and thalis) is easily available, I have almost never come across authentic Hyderabadi food. This is utterly befuddling to me, as Hyderabadi cuisine is one of the richest food traditions…