You can’t get much far ther from fast food than at Spain’s El Bulli, which Restaurant magazine declared the finest in the world. Just why the eatery, which has three Michelin stars, is so highly regarded can be found in “El Bulli: Cooking in Progress,” a tasty documentary by Gereon Wetzel.

Located in a secluded, bucolic setting a few hours’ drive from Barcelona, the restaurant — which seats 50 at a time but fields 2 million reservation requests a year — is open for just six months annually. The rest of the time, superchef Ferran Adria and his staff prepare the next season’s 30-course prix-fixe menu, which is intended to be consumed over three hours.

They do so with the same precision that a general might use to plan a major battle. Notes and photos are taken, and new tasty treats — like sea cucumbers with ham fat and hot yogurt whey jelly — are concocted. The planning extends to determining how many brooms are needed to keep the kitchen clean. (Four, Adria maintains.)

Among the lucky few who’ve gotten a table are Eva Longoria, Heather Graham and Penelope Cruz.

“We cannot afford to make mistakes,” says the outspoken Adria. “It’s simply bad,” he tells an associate of a just-completed dish.

The documentary opens just days before El Bulli shuts down for good. Adria says it will reopen in 2014 as a “think tank for creative culture and gastronomy.”

Meanwhile, there are rumors in Spain that there will be a Hollywood movie about El Bulli, possibly starring Johnny Depp.