4 days in Barcelona?! YES!
I was recommended to go to El Quim, in La Boqueria, the big food market just off La Rambla. They specialise in workers breakfasts, eggs, squid and beans, tripe... No I didn't go for the tripe! I had the eggs with wild mushrooms, since I'd seen so many varieties on display all through the market and they looked fantastic! I also had the squid and beans San Pau which I'd had recommended a couple of times, and tried some acorn fed jamon - not all in the same visit!