Start by setting your Instant Pot to the sauté function. Add the extra-virgin olive oil and let it heat up. Once hot, add the sliced sirloin steak. Sauté for about 3-5 minutes until the beef is browned on all sides. Make sure not to overcrowd the pot; you can do this in batches if necessary.
Once the beef is browned, add the low-sodium soy sauce, oyster sauce, honey, rice vinegar, chili-garlic sauce, minced garlic, and beef broth to the pot. Stir well to combine all the flavors and ensure the beef is evenly coated with the sauce.
Seal the Instant Pot lid and set the valve to 'sealing.' Select the manual or pressure cook option and set the timer for 10 minutes. Once the cooking is complete, allow for a natural release for about 5 minutes before switching the valve to 'venting' to release any remaining pressure.
After the pressure has been released, carefully remove the lid. Add the steam-in-the-bag frozen broccoli florets to the pot. Stir to incorporate them into the beef mixture.
In a small bowl, whisk together the cornstarch and water to create a slurry. Pour this mixture into the Instant Pot, stirring constantly until the sauce thickens. This should take just a couple of minutes.
Once the sauce has thickened, it’s time to serve! Spoon the beef and broccoli mixture over prepared brown rice, cauliflower rice, or quinoa. Garnish with chopped green onions and toasted sesame seeds for an extra pop of flavor and crunch.