Press on the SAUTE setting on the Instant Pot and heat the oil.
Saute the garlic and ginger for a minute, then add the beef to brown it. When the beef is browned, add the sauce ingredients and give them a stir. Switch off the SAUTE setting.
Secure the lid and set the vent to SEALING. Select the PRESSURE COOK/MANUAL setting and set the cooking time for 8 minutes at high pressure. The Instant Pot will take around 5 minutes to come to pressure and start cooking. When the cooking program ends, quickly release the steam and remove the lid.
To thicken the sauce:
Press on the SAUTE setting, and add the cornstarch slurry. Stir the sauce until it's thickened. If it's not thick enough, then add one more tablespoon of cornstarch with water mixed together before adding to the pot.
Stir in the cooked broccoli and serve over rice. Garnish with toasted sesame seeds.
I made a small quantity for this post, but you can easily double or triple the amount of the ingredients. The cooking time remains the same.
Initially, the recipe called for half a cup of low-sodium soy sauce, but we decided to change this to just fourth a cup after we received feedback that the sauce turned out too salty.
For more flavor, add 1 teaspoon of oyster sauce to the sauce.