Put pot on saute setting. Add 1 tbsp olive oil. Season roast with salt, pepper and minced garlic. Saute for 4 minutes per side. Turn off and add broth. Use a wooden spoon to scrape any bits off the bottom of the pot.
Add carrots and onions. Set to high pressure for 45 minutes with valve closed. Allow to release naturally for 10 minutes.
Release any remaining pressure and open lid, keeping face back. Remove beef to a large cutting board and use two large forks to shred. Move shredded meat to a large serving dish. Using a slotted spoon remove the cooked carrot and onion from the pot, adding to the serving dish.
Notes
This recipe makes a generous amount of food. 8 large servings approximately 1.25 cups each.