Place beef in a medium bowl, then pour all of the marinade ingredients on top. Cover and let sit at room temperature for 10 minutes.
Mix the sauce ingredients together in a medium bowl. Set aside.
Once the steak has marinated, set Instant Pot to ‘saute’. Add oil and let heat until shimmering. Add steak and cook for 1 to 2 minutes, or until it begins to brown. Turn instant pot off.
Add sauce to the Instant Pot, then add the lid with the valve set to ‘seal’. Press Pressure cook and cook on high for 10 minutes.
While the beef cooks, bring a large pot of salted water to a boil. Add broccoli and cook for 3 to 4 minutes, or until crisp tender. Drain and rinse under cold water.
When the cooking time is up, let the pressure release naturally on the Instant Pot for 10 minutes. After 10 minutes, move valve to ‘vent’ to let the remaining pressure out.
Carefully open and remove the lid. Add broccoli, stirring to coat in the sauce.