Whisk the cornstarch and cold water until smooth. Add to a skillet.
Add the rest of the sauce ingredients to the skillet.
Heat the skillet over medium to medium-high heat, until bubbling and thickened. Allow to cool.
For the Salmon
Add the salmon fillets to a bowl and toss to coat with 1/4 cup of the sauce. Let sit skin side up for 10-15 minutes to marinate.
Preheat the air fryer to 400℉ (200℃).
Place the salmon fillets skin side down on the air fryer tray or basket.
Air fry for 6-8 minutes or until they reach an internal temperature of 145℉ (63°C).
Top with green onions and serve with extra sauce if you prefer it.
Video
Notes
Always use cold water when making a cornstarch slurry so that the cornstarch can dissolve evenly.Use an instant read meat thermometer to check for the proper internal temperature. I have a meat thermometer similar to this one which I bought for $15.Meal prep: make the sauce ahead of time and store it in the fridge. This makes prepping this dish quicker on the night you want to serve it.Don't mix raw fish with the sauce that you want to keep. Just portion out ¼ cup of sauce onto the fish and don't dip the spoon back. Save the extra sauce in the fridge for other uses.No air fryer? Bake the salmon in the oven at 400°F (200°C) for 10-14 minutes instead.The sauce recipe makes about 1 cup of sauce and you'll use 1/4 cup of it cooking the salmon. Serve more on the side or save the extra sauce for another use.