Instant Pot Beef and Broccoli

Season the beef with pepper. Cut it against the grain, into thin strips.
Pour the olive oil into the instant pot and turn on the saute function. When the oil is hot, add the beef (in batches if necessary, it's best to not crowd it). Allow the beef to brown on all sides. This will take 5-10 minutes.
While the beef is browning, we will prepare the sauce. In a medium sized bowl, stir together the soy sauce, oyster sauce, brown sugar, sesame oil, ginger, red pepper flakes, and garlic.
When the beef is browned, add the beef broth to the pot. Make sure to scrape up any bits of beef that are stuck to the bottom of the pot. Add the sauce and stir well. Switch off the saute function.
Seal the pot and set to cook on high pressure for 10 minutes. Use the quick pressure release.
In a small bowl, create a slurry by mixing the cornstarch and water. Stir this into the mixture in the instant pot. Turn on the saute function and bring this mixture to a boil.
Make sure the broccoli is cut into bite-size pieces. Add the broccoli to the pot and stir in, put on the lid and allow it to boil for 3 minutes, then turn off the saute function. With the pot turned off, allow the mixture to it for 5 more minutes, or until the broccoli reaches the desired crispness.
Serve with chopped green onions and toasted sesame seeds.