Step 1 of 6
Slice beef into 1/2 to 3/4 inch strips.
Step 2 of 6
Put oil in the Instant Pot and select "sauté". When the oil is hot, brown the mean in batches until all meat is browned -- do not crowd. Transfer meat to a plate when browned.
Step 3 of 6
Add the garlic and sauté 1 minute. Add soy sauce, 1/2 cup of water, brown sugar (can be reduced a little), and ginger. Stir to combine.
Step 4 of 6
Add browned beef and any accumulated juices. Select "High Pressure". Set timer for 20 minutes.
Step 5 of 6
When done, turn Instant Pot off and use the quick pressure release.
Step 6 of 6
Combine the cornstarch and 3 tablespoons water, whisking until smooth. Add cornstarch mixture to the sauce in the pot and stir constantly. Select "sauté" and bring to a boil, stirring constantly until the sauce thickens. Stir in the green onions.