To a small mixing bowl add the garlic, ginger, red pepper, soy sauce, sesame oil, broth, and brown sugar. Whisk together until the sauce is evenly combined. Set aside.
Make sure the liner is in the pot, then add the oil and hit the sauté button. Once the oil's hot add half the beef. Let the beef sear, cooking for about two minutes.
Stir, turning the beef and continue cooking on its other side for another two minutes. Transfer the cooked beef to a waiting plate. Repeat for the remaining beef, and cover the plate with foil to keep the beef warm.
Add the 1/4 cup of water to the hot pot to deglaze, and using a sturdy wooden spoon scrape up any browned flavor bits.
Add the beef back to the pot, and pour the sauce mix over it. Stir just until evenly combined.
Add the lid to the pot, turning to close and set the vent valve to the sealed position. Cook on HIGH pressure for 10 minutes, then let it sit for a 10 minute natural release.
Carefully turn the vent valve to open and release any of the remaining trapped steam.
Add both the cornstarch and water to a small mixing bowl- whisk together until evenly combined. Pour the slurry into the pot, stirring to combine.
Hit the saute button again and cook, stirring often, for another 5 minutes- just until the sauce has thickened. Hit the cancel button to turn off the Instant Pot.
Add the steamed broccoli to the pot, stirring to combine.
Serve the beef & broccoli over steamed white rice & enjoy!