“We are just getting the stall started,” says Ton Díaz. In a corner of the Ninot market in Barcelona’s Eixample district, Tonet del Mercat—or just Tonet—has been set up for a few weeks now. It bears Ton Díaz’s name because he is the axis around which this project revolves, based on nose-to-tail cooking, such as offal and other meat by-products. “This week we are adding sweetbreads and kidneys with sherry and onions,” says a thrilled Díaz.