Sauté the Vegetables – Set the Instant Pot to Sauté mode on High or More. Heat the olive oil for 3 minutes, then add the diced onion, carrot, and celery. Stir and cook for about 5 minutes, until the vegetables soften.
Brown the Beef – Add the minced garlic and beef chunks to the pot. Sear the beef for 2-3 minutes on each side, allowing it to develop a deep, rich color.
Add Remaining Ingredients – Pour in the beef broth, then stir in the barley, Worcestershire sauce, seasoned salt, thyme, and black pepper. Use a wooden spoon to scrape up any browned bits from the bottom of the pot. Finally, add the potatoes and bay leaves.
Pressure Cook – Secure the lid and ensure the valve is set to Sealing. Select Manual or Pressure Cook on High Pressure for 20 minutes. Once the cooking cycle is complete, allow 15 minutes of natural release, then carefully perform a quick release for any remaining pressure.
Serve & Enjoy – Open the lid, remove the bay leaves, and stir the soup. If desired, let it sit for a few extra minutes to allow the barley to absorb more liquid. Serve hot and enjoy!