Classic Chicago Italian Beef Sandwich with Spicy Giardiniera Step-by-step instructions

Before you start

Before you begin, ensure your roast beef is fully chilled in the refrigerator, as cold meat is much easier to slice into paper-thin pieces. Prepare your workspace by setting out your deli slicer, saucepan, and assembly area.

Have your French rolls split open and ready, and ensure your giardiniera and sweet peppers are drained slightly if they are packed in excess oil. Efficiency is key to keeping the gravy at the perfect temperature while assembling the sandwiches.

Instructions

Prep and Slicing

1. 1Prepare the Ingredients
   Using a sharp deli slicer, carefully shave the chilled roasted sirloin into paper-thin slices to ensure the most tender texture possible. Measure out the spicy giardiniera and the sweet roasted bell peppers, keeping them ready for assembly. Ensure the French rolls are split and ready to be filled, as this dish moves quickly once the gravy is hot.
   Look for The beef should be sliced as thin as possible to melt in the mouth.
   Tip Chill the roast beef thoroughly in the refrigerator before slicing to achieve paper-thin results.

The beef should be shaved into uniform, paper-thin slices that are ready for the gravy. Ensure all your toppings are measured and placed within reach. The kitchen should be organized and ready for the quick assembly phase that follows the cooking step. Take a moment to check your rolls to ensure they are properly sliced and ready for the filling process, as this will keep the assembly smooth and efficient.

Heating the Beef

2. 2Simmer the Beef
   Pour the beef au jus into a large saucepan and stir in the dried oregano. Bring the liquid to a gentle simmer over medium heat. Add the shaved roast beef slices to the pan and let them cook for 2 minutes, ensuring they reach an internal temperature of at least 145°F (63°C). Let the meat rest for at least 3 minutes before final assembly to ensure the juices redistribute.
   Look for The beef should be heated through and infused with the oregano aroma.
   Safe temperature 145°F (63°C) internal temperature (steaks, chops and roasts)
   Tip Do not let the gravy boil vigorously, as this can cause the meat to become tough.

The gravy should be steaming and fragrant with the scent of oregano. The beef slices should be tender and heated through, having absorbed the savory juices without becoming overcooked.

Ensure the gravy is kept at a gentle simmer, as this maintains the ideal temperature for the meat and the subsequent dunking process. You should see the beef slices becoming darker and more succulent as they absorb the flavorful liquid.

Assembly and Dunking

3. 3Assemble and Dunk
   Using tongs, pile the hot, seasoned beef into the sturdy French rolls. Add the sweet roasted peppers and a generous scoop of the spicy giardiniera to each roll. Carefully dunk the entire filled sandwich into the hot beef gravy for a few seconds to let the bread absorb the savory juices. Serve immediately while the sandwich is hot, juicy, and flavorful.
   Look for The roll should be soaked but still hold its shape during the dunk.
   Tip Keep extra gravy on the side for dipping if desired.

The sandwiches should be assembled with a generous pile of beef, topped with the peppers and giardiniera. The final dunk should be quick and deliberate, ensuring the roll is thoroughly coated in the beef jus.

The finished sandwich will look glossy and moist, with the giardiniera providing a bright pop of color against the deep, savory brown of the beef and gravy. It should be served immediately on a platter.

Common mistakes

Avoid slicing the beef too thick, as this will result in a chewy sandwich rather than the traditional tender version. Do not let the gravy boil aggressively, as it can reduce too much and become overly salty.

Another common mistake is failing to use a sturdy enough roll; if the bread is too soft, it will turn into mush during the dunking process. Always ensure the rolls are fresh but firm enough to hold the weight of the meat.

How to tell it’s done

The beef is done when it is heated through in the gravy, reaching an internal temperature of at least 145°F (63°C). Let the beef rest for at least 3 minutes after slicing if it was freshly roasted. The sandwich should be served immediately while the roll is warm and soaked with the savory jus. It should feel heavy and substantial in the hand, with the beef juices beginning to drip from the edges of the roll.

• Steaks, chops and roasts: 145°F (63°C) in the thickest part, then a 3-minute rest