Enjoy roasted beef in a rich seasoned au jus, shaved thin and topped on a bun with hot giardiniera. Get a tried and true recipe from a born and raised Chicagoan.
Dear Reader,In order to achieve a truly delicious and authentic version of this recipe, it's important to note that it is time intensive but well worth the wait! Enjoy! - Chef L
Start with a bottom round roast. Remove it from the packaging, pat it dry, and the season with salt. Place it back into the fridge uncovered to dry brine for 24-48 hours (do not skip this step).
Use a high quality beef stock or even a beef bone broth to make the base of the au jus. You can purchase this from your local butcher or make your own for best results.
Roast the beef until it reaches an internal temperature of 195 F. This helps make it tender enough to break down tougher connective tissue, but not enough that it falls apart.
Chill the beef roast and the au jus over night or for at least 12 hours. Cold meat is necessary for slicing the beef into paper thin slices to make this sandwich.
The best way to slice the beef super thin is with a deli slicer. If the meat is chilled, you can slice it with a sharp knife as thin as possible. It's not easy, but doable.
Bring the au jus up to a simmer on the stove. Drop handfuls of the sliced beef into the au jus to cook for 5-10 minutes. This heats it through and adds a lot of flavor.