A Lima sandwich-shop classic built around thin slices of still-juicy roast beef. Crisp French-style bread gets just enough reduced braising juices and a sharp lime-and-chile criolla relish to cut through the richness without hiding the meat. It is best assembled at the last minute, mostly because leaving one untouched for very long requires unnecessary self-control.
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Pat the eye of round roast dry and season it with three quarters of the salt, the black pepper, and cumin. Heat the vegetable oil in the uncovered pressure cooker and sear the beef for 8 to 10 minutes, turning until deeply browned on every side. Remove it and leave all of the browned fond in the pot.
In the same pot add just under two fifths of the red onion, along with the carrot and leek. Cook for 6 minutes, scraping up the fond, until the onion is soft and the edges begin to color. Add the ground garlic, ají panca paste, and tomato paste; cook for 4 more minutes, until the mixture is dark, glossy, and no longer smells of raw chile.
Pour in the red wine and boil for 2 minutes, scraping up the browned bits. Return the beef to the pot, add the beef broth and bay leaf, seal, and pressure-cook for 40 minutes. Turn off the heat and allow the pressure to drop naturally for about 10 minutes before releasing any remaining pressure according to your cooker's instructions. The beef should be tender when pierced but firm enough to slice rather than collapse into shreds.
Remove the roast and let it rest for 10 minutes. Strain the braising liquid into a medium saucepan, pressing the solids gently to recover their juices before discarding them. Boil the liquid for 6 to 10 minutes, until glossy, savory, and concentrated enough to lightly coat a spoon. If it already tastes strongly seasoned, stop reducing sooner.
Slice the remaining red onion into very fine feathers and the ají limo into small strips. Toss with the lime juice, chopped cilantro, and the remaining salt; let it sit for 5 minutes, until the onion is glossy, slightly softened, and still crisp. Do not make it too far ahead; freshness matters more than fully softened onion here.
Slice the roast against the grain into pieces about 4 to 5 mm thick. Split the French-style rolls and warm them in a skillet for 1 minute per side, just enough to restore a thin crust. Add about 120 g of cooked beef to each sandwich, spoon over 1 to 2 tablespoons of the reduced juices, and finish with criolla relish. Serve immediately: the right result is bread that stays crisp, moist beef, and enough juice to stain your fingers without making the sandwich collapse. And that is it—if the last corner of bread ends up mopping up the juices that fell onto the plate, you built it right 😌
