Chop/slice your vegetables.
Cut your beef into ½ inch cubes.
Set frozen peas and corn aside.
In Instant Pot, combine remaining ingredients (beef, beef broth, au jus gravy mix, diced tomato, onion, mushrooms, carrots, garlic, barley, thyme, rosemary, Italian seasoning and black pepper).
Stir to make sure no ingredients are sticking to the bottom of the Instant Pot.
Cook on high pressure for 20 minutes.
Once finished, press cancel and quick release remaining pressure.
Stir in peas and corn. Enjoy!