Here's a reader recommendation we received for a good burger in Spain you probably wouldn't expect.
'Barcelona' on Serious Eats
McDonald's condiment options don't include foie gras mayo (big shocker) but at Tapaç24, the small plates hotspot in Barcelona, they pay homage to the fast-food chain in the form of this little burger. The beef patty comes medium-rare, almost tartare-rare in the very center, on a thin, crisp bun. Nothing else on the burger, just that little black dish of creamy foie on the side waiting to be spooned up. As my Kindergarten teacher Ms. Wookey said, a little dab will do ya (in that context she was referring to Elmer's glue).