Fish and cookies may seem like an incongruous duo, but I’ve been hooked on the idea of savory anchovy shortbread since Anna Harrington, the founder of a cookie company called the Rounds, shared her recipe a few years ago with TASTE, where I used to be an editor. Anna makes a variety of savory shortbreads, bringing together flavor combinations like curry and cashew, Gruyère and date, and Parmesan and olive. In my riff on her anchovy and green onion shortbread, the tarragon d