Once the oil is hot, add in ginger and garlic. Saute for a minute or until you can start to smell it cooking. Press the CANCEL button.
Add in beef broth, soy sauce, and brown sugar. Whisk liquid together with the ginger and garlic.
Place the steak in the liquid, place the lid on top, and move the valve to SEALING (not venting).
Press the PRESSURE COOK button and set timer for 15 minutes.
While beef is cooking, mix together cornstarch and water. Set aside.
As soon as the timer is finished, do a QUICK RELEASE of the pressure (if you do a natural release, the meat might be overcooked).
Remove the lid and pour in the cornstarch mixture, mixing it in quickly so that it doesn't leave behind clumps.
Add in the peppers and onions. Press the SAUTE button and let the mixture cook for a few minutes until the sauce thickens up and the vegetables have softened slightly (about 1-2 minutes). Serve over cooked rice.
Notes
Remember, you can always add time, but you cant take time away. Overcooking the steak will definitely give you tough, chewy meat.