Spain was one of the first countries to take advantage of preservation techniques in the fruit and vegetable industry. Today, the Ebro Valley is the leading producer of canned fruits and vegetables thanks to the quality of its raw materials and a respect for the produce.
There are several varieties of artichoke, but the one grown in Tudela, Navarra is among the most highly prized. In traditional canneries, the hearts are collected, blanched, weighed, and peeled by hand. There is a trick for inspecting their quality when jarred: they should be a brownish-gray color, as the more preservatives used, the greener their appearance.