Add your frozen meatballs inside the Instant Pot insert
In a cereal size bowl, dissolve one tablespoon of Gochujang in 1 cup of hot water
Add your brown sugar to the mixture and mix to dissolve.
Add in your soy sauce and hoisin sauce to the bowl
Add both you pressed garlic and grated ginger to the mixture
Cut up 2 spring onion stalks into small pieces
Add everything onto your meatballs and mix briefly.
Place your lid onto the Instant Pot, lock, and set to seal
Set your pot on Manual or High-Pressure mode for 5 minutes
Quick-release when the 5 minutes are done
Make a quick slurry of 1.5 teaspoon of potato (or cornstarch) with 1-2 tablespoons of water and add to your Instant Pot on Sauté mode.
Cook for a few minutes, stirring often until the desired thickness of the sauce. You can add a bit more slurry if you are really looking for a thicker glaze.