Add olive oil to the Instant Pot and turn on the saute setting.
Brown the flank steak pieces in the olive oil.
Add minced garlic, brown sugar, liquid smoke, soy sauce, and beef base and stir together well.
Add water to the Instant Pot, close the lid, and seal the vent. Cook on high pressure for 10 minutes.
When done, do a quick release to vent the steam.
Change setting to saute. Add broccoli and cornstarch, stir, and allow to saute for 3-4 minutes. Do not put the lid on.
A gravy can be made from the juices in the pan by making a slurry of 1 tablespoon of cornstarch and about 1/2 cup of the juices. Combine well then add slurry to the remaining juices in the pot. Cook on saute function until bubbly and mixtures begins to thicken.
Prep time includes bringing your Instant Pot up to pressure.
You can use chuck roast instead of flank steak for this recipe if you like.
Store any cooled leftovers in an air-tight container kept in the refrigerator for 3-4 days. Reheat in a skillet over medium-low heat, adding a splash of water or beef broth to bring moisture back if needed.