Combine the sauce ingredients garlic, soy sauce, sesame oil, beef broth and brown sugar together in a small bowl & whisk.
Add your sliced steak to the Instant Pot then add your sauce mixture.
Close the Instant Pot lid, close the seal.
Cook on manual for 10 minutes.
Natural release for 10 minutes & then do a quick release.
Remove beef from pot & set aside.
Turn off the Instant pot & then turn it on to saute
Whisk in cornstarch & stir until sauce thickens.
Add the beef back in & stir.
Add in steamed broccoli.
Serve over rice.