If I lived in Barcelona, becoming a regular at Entrepanes Diaz would be a life goal. Every detail at this 50s-style bar is thoughtfully executed as is their food. It's all about bocadillos (Spanish sandwiches) and I've recreated my favorite, the {Bocadillo Antxón} Shoestring Fry Chorizo Egg Sandwich recipe!
For The Shoestring Fries: Fill a large, heavy-bottomed saucepan with a couple of inches of oil and heat over medium heat until a deep-fry thermometer reads 365°F. Line a plate with paper towels and set aside. Meanwhile, slice the potatoes into shoestring fries with the thin julienne attachment of a hand-held mandoline or vegetable slicer. Swish the cut potatoes in a bowl of water with a few capfuls of vinegar added then spin them as dry as possible in a salad spinner. Spread them on towels, and blot with more towels—you want the potatoes as dry as possible to prevent the oil from splattering.
Fry The Fries: Increase the heat to medium-high, and working in batches, carefully add the potatoes to the oil and fry until brown and crispy, about 3 to 4 minutes. Scoop the fries from the oil with a slotted spoon, and drain on the prepared plate. Repeat with the rest of the potatoes, making sure the oil returns to 365°F before adding the next batch. Season with salt and set aside until ready to use.
Brown The Chorizo: Meanwhile, crumble the chorizo into a medium frying pan and cook over medium heat until well browned, about 10 minutes. Remove the chorizo to a plate with a slotted spoon and then cook the eggs, one by one, in the chorizo drippings to desired doneness.
Assemble The Sandwich: To serve, mix the mayonnaise with a pinch of paprika (add more to your liking). Spread the mayonnaise on the bottom of each brioche bun then divide the browned chorizo between the two buns. Top each with a fried egg and a ridiculous amount of the fries. Close the sandwiches and serve.