Not only do they roast all kinds of nuts in house (the place smells heavenly), they also feature many Catalan spices and ingredients as well as foreign delicacies. I may or may not have bought a ton of small bags of freshly toasted nuts to bring back home. We visited here in May at the beginning of our trip to shoot season 14 of  “Sara’s Weeknight Meals.” You must visit this place next time you go to Barcelona! But you can also buy their products online.  https://www.casagispert.com/en/