Philippe The Original, home of the French dip beef sandwich, is a Los Angeles institution that has been in operation since 1908. To create her version their classic sandwich at home, Claire uses flavorful chuck roast, which she sears in a hot oven, then cooks low and slow until tender and perfectly rare. Sliced thin, piled high on crusty buttered rolls and dipped in flavorful "jus," this dish is truly unforgettable.
Let the chuck roast sit out at room temperature for at least 1 and up to 2 hours.
Preheat the oven to 450 degrees F.
Using paper towels, pat the roast completely dry. Spread the compound butter mixture all over the entire roast.
Place the onions, carrots, garlic, thyme and rosemary in the bottom of a large roasting pan and place the roast on top.
Roast for 15 minutes, then lower the oven temperature to 250 degrees F. Continue roasting until a meat thermometer registers 120 degrees F, about 2 hours. Remove the roast from the oven, cover with aluminum foil and let rest for 15 minutes. Transfer the roast to a cutting board and drain off the juices that have accumulated in the pan to serve as the "jus."
Spread some butter on one side of the sandwich rolls and horseradish sauce on the other side. Drizzle some of the reserved jus on the inside of each roll.
Thinly slice the beef and add about 1/2 pound (8 ounces) to each roll. Slice each sandwich in half on a diagonal and serve with the jus.
In a small bowl combine the butter, herbs, garlic, 2 teaspoons kosher salt, 2 teaspoons pepper, garlic powder, cloves and nutmeg and mix well to form a thick paste.