Preheat your oven to 350 degrees to toast the sub rolls.
Place the beef cut of your choosing into the instant pot.
Pour a can of beef broth on top.
Sprinkle a packet of Italian dressing seasoning over the meat.
Add the garlic powder and Italian seasoning.
Top with the sliced banana peppers.
Set your pressure cooker to high pressure. Make sure the valve is set to seal. Cook the meat for 25 minutes.
While your beef is pressure cooking, toast your sub rolls. Place your open sub rolls into the oven on a cookie sheet for about 5-10 minutes until golden brown.
Remove the toasted sub rolls from the oven, however do not turn your oven off.
After 25 minutes of pressure cook time, quick release the pressure by moving the value from seal to vent. When all of the steam has escaped, remove the lid.
Remove the beef and shred into smaller pieces.
Add the shredded beef to your toasted sub rolls.
Top each sub with the cheese of your choice.
Place the subs back into the oven at 350 degrees for another 3-5 minutes until the cheese is melted.
Serve your Instant Pot Italian Beef Sandwiches with a side of your choice. Ladle some of the delicious au jus into a cup to dip your sandwich into.