Roasted Bell Pepper Salad with Anchovies and Garlic

La Brigada, in the San Telmo district, is one of the obligatory stops on a beef eater’s pilgrimage through Buenos Aires, and if with each passing year the tourists seem to displace a few more of the locals, most porteños (the citizens of Buenos Aires) still give its grilled grass-fed beef a big thumbs up. But while you’re overdosing on red meat, save room for the grilled pepper salad. This is about as elaborate as an Argentinean vegetable dish gets; the salty tang of anchovies, the p