Sprinkle beef all over with salt and pepper. In a 6 or 8-quart Instant Pot® heat oil using the sauté setting then brown pieces on all sides. Alternatively, in a large skillet brown beef over medium high heat. Place beef on a plate.
Add Pacific Foods Organic Low Sodium Beef Broth, tomato sauce, and chili powder to Instant Pot®, then place beef back in. Place lid on pressure cooker, and seal. Make sure steam valve is set on “sealing.”
Cook using manual setting (high pressure) for 1 hour. Let pressure release naturally for 10 minutes, then use tongs to open steam valve and release pressure completely.
Use 2 large forks to shred beef and toss with sauce to coat.
Serve shredded beef with tortillas, lettuce, pico de gallo, cheese, cilantro, and lime wedges.