1. Secure bib.
2. Strip off charred skin revealing white meat.
3.Dunk generously in romesco sauce.
4. Tilt head back and bite sweet onion in half.
6. Repeat 19 more times.
These are the basic steps to eating calçots, a seasonal Catalan food that is something between a sweet onion and a leek. Millions of these toothsome winter treats are served sizzling off the barbecue from January to April in Catalonia, Spain.…