Oil-Cured Anchovy Crostini with Cultured Butter

It’s rare that I would go out for a drink in Rome and not order anchovies: Rome is one place where anchovies are treated with the reverence they deserve, each fillet laid out smoothly in parallel to its neighbor. At Roscioli, there is even a section of the menu dedicated to different anchovy selections. And though Rome is awash in olive oil, most of the time, anchovies (even oil-marinated anchovies) are served, as here, with good butter. It is a gorgeous cushion for the saltiness of the anc