Here’s the scene: working-class neighborhood, first house, first back yard, first patio. Radical move against the local pave-the-yard-build-a-grape-arbor esthetic. We christened the patio’s finish by inviting neighbors Pam and Chris to join us for Grilled Spring Onions with Romesco. At the time, almost two decades ago, I’d heard of Romesco, the thick Catalan sauce based on roasted red peppers and nuts, but not grilled spring onions, which my wife assured me was a big deal in Barcelona. She was right. The Calçotada is a month-long Barcelonan lovefest to calçots, spring onions, which are then grilled and slathered with Romesco. Imagine a sloppy Falstaffian bender lasting most of April, involving untold quantities of red wine and masses of fragrant grilled onions wrapped in newspapers or served in inverted clay roofing tiles and eaten with your hands. Uh-huh, who isn’t down for that?