Portillo’s Italian Beef, unlike its name, does not have an Italian origin. But it does have something to do with Italians. It was originated in Chicago by the Italian immigrants that resided in Chicago.
Take a skillet and add vegetable oil to it. Heat the oil.
In the hot oil, add the beef chuck, salt, and black pepper and sear it. Make sure to sear on all sides so that the beef gets caramelized evenly all over.
Take the stewed beef out of the skillet and brush the prepared mustard on all the surfaces of the beef.
Take a crockpot and add chunked celery, chunked carrots, and quartered onions in it so that they make a vegetable bed.
On the vegetable bed, add all the herbs and spices along with bay leaf.
Put a layer of seared beef on the vegetable bed and spices.
In this preparation, add the beef broth all over.
Cover the crockpot and cook it. Cook on a high for 6 hours. If you have time, cook on low for 12 hours. It will bring out better results. The desired level of doneness is when the meat is completely tender and can be easily shredded. If you are doing slow cooking, keep adding more beef broth to maintain its level so the recipe does not dry out.
When completely cooked, remove the meat and put it in a separate dish. Then take out the vegetables and all other ingredients and put them in a sauce pot.
Simmer this mixture and lessen the volume of the sauce to half.
Strain the sauce. Remove the solids and discard them.
Place the beef in a flat dish or plate and shred it using forks.
Warm the beef in a heated pan with a small amount of broth.
Then slice and toast the hoagie rolls.
On each side of sliced bread, spread the mustard and mayonnaise.
Put on a layer of warmed beef and then add pepper strips along the sides of the roll to seal the contents inside. Your yummy Portillo’s Italian Beef is ready. Serve while hot along with the broth. Bon appetit!