Our next stop is Bernie's Diner Grill & Bar, a careful reproduction of a North American diner, right down to the furniture shipped over from the States. What sets it apart from other similar establishments, explains co-owner Argentinean Martín Stefandis, is the wide selection. "It's not just a burger joint - this is an American restaurant with a grill for cooking ribs, rib eye steaks and fillet steaks," along with specials like the 'escalope a la napolitana'. "Like in the United States, restaurants owned by immigrants have their own specialties," he says. They boast a stone grill, so the meat gets cooked on hot volcanic rock and comes out with a fantastic smoke flavour.
The last stop on our little tour takes us to El Club de la Hamburguesa, where Felipe Español - also Argentinean, like the owner of Bernie's – explains that "the key to our success is a great value and variety, with quality ingredients." These aren't gourmet burgers, but they sure are satisfying, with carefully thought-out recipes and nice presentation: try the 'mexicana', a refreshing option with guacamole, chilli, tomato and cheddar.
And here's something new: burger fever has reached the Boqueria. At stall 280, Boqueria Burger, with its do-it-yourself spirit, wide selection of toppings - mushrooms, 'samfaina', curry, blue cheese - special buns and 26 types of sauce, all in individual packets. For €8, you can get everything you need for two hamburgers, some assembly required.