Arrange the trivet in the bottom of Instant Pot. Add 1 cup of water in Instant Pot.
In a heatproof bowl, add egg, water, garlic powder, salt and black pepper and beat until well combined.
Stir in scallion and sesame seeds.
Place the bowl on top of trivet.
Secure the lid and cook under “Manual” and “High Pressure” for about 5 minutes.
Select “Cancel” and carefully do a Quick release.