Select "SAUTE" on the instant pot and add olive oil to the pot. Add the sliced beef and brown on each side for about 2 minutes.
Transfer browned beef to a plate. Add pressed garlic to the pot and cook for about one minute. Pour in the beef broth and scrape up the browned bits on the bottom of the pot.
To the broth, add the brown sugar, sesame oil, and soy sauce. Whisk together. Add in the beef.
Lock the lid in place and make sure the valve is set to "SEALING."
Select "HIGH PRESSURE" and a cook time of 15 minutes. When the cook time ends, allow the pot to naturally release for 10 minutes.
After the ten minute natural release, move the valve to "VENTING" and allow the remaining pressure to release.
Remove the lid. Stir the beef in the sauce. Turn the Instant Pot back on "SAUTE." In a small bowl, whisk together the cornstarch with cold water. Pour into the pot.
Cook for about 3 minutes, stirring constantly. When the sauce is thickened, add in the FROZEN broccoli. Allow the broccoli to cook, which will take about 2-3 minutes. Turn off Instant Pot.
To serve, spoon broccoli beef over rice or noodles (ramen is really tasty)! Sprinkle with sesame seeds, if desired. ENJOY.
Notes
Recipe tested in 6 quart Instant Pot.
Broccoli Beef is great for meal prep! Add the beef broccoli to an airtight container with a side of rice (or noodles). Refrigerate and use within 4 days.