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["Butterfly the beef or ask the butcher to do it.", "Lay the pancetta strips on top of the beef and close it up and tie off in 4 places with kitchen twine. Salt lightly.", "In a flameproof casserole, melt the olive oil and butter over medium heat then cook, turning with tongs, the beef and onion until the beef is brown on all sides, about 10 minutes.", "Add the beer and bring to a boil. Transfer to the KitchenAid(R) Slow Cooker and set on ""low"" and leave for 5 hours.", "Add the broth, potato starch, mustard, and thyme, and the Slow Cooker leave on ""low"" for another 4 hours.", "Remove the beef and set aside keeping it warm covered with aluminum in a low oven. Transfer the liquid to a saucepan and reduce over high heat until syrupy, about 50 minutes. Reduce the liquid until saucy over high heat, about 50 minutes. Slice the beef and arrange on a platter and spoon the sauce over and serve.", "Butterfly the beef or ask the butcher to do it.", "Lay the pancetta strips on top of the beef and close it up and tie off in 4 places with kitchen twine. Salt lightly.", "In a flameproof casserole, melt the olive oil and butter over medium heat then cook, turning with tongs, the beef and onion until the beef is brown on all sides, about 10 minutes.", "Add the beer and bring to a boil. Transfer to the KitchenAid(R) Slow Cooker and set on ""low"" and leave for 5 hours.", "Add the broth, potato starch, mustard, and thyme, and leave the Slow Cooker on ""low"" for another 4 hours.", "Remove the beef and set aside keeping it warm covered with aluminum in a low oven. Transfer the liquid to a saucepan and reduce over high heat until syrupy, about 50 minutes. Reduce the liquid until saucy over high heat, about 50 minutes. Slice the beef and arrange on a platter and spoon the sauce over and serve."]
