Prepare the Teriyaki Sauce:

In a small saucepan, combine the soy sauce, ¾ of the water, minced garlic, grated ginger, honey, and brown sugar.

Place the saucepan over medium heat and whisk the mixture until the sugar has dissolved and starts to thicken.

In a separate bowl, mix the cornstarch with the remaining cold water to create a slurry.

Add the cornstarch slurry to the saucepan and continue to whisk the mixture until it thickens to a glossy consistency. This should take about 2-3 minutes.

Remove the teriyaki sauce from heat and set it aside to cool.

Marinate the Salmon:

Place the salmon fillets in a shallow dish or a resealable plastic bag.

Pour the teriyaki sauce over the salmon. Make sure the salmon is well coated.

Seal the bag or cover the dish and refrigerate for at least 15 minutes (or up to 1 hour) to allow the salmon to marinate.

Air Fry the Salmon:

Remove the marinated salmon from the refrigerator and place it in an air fryer safe dish.

Air fry the salmon for about 12 minutes, or until it reaches your desired level of doneness. The salmon should be flaky and cooked through.

If you like your salmon with a caramelized glaze, brush the reserved teriyaki sauce over the salmon fillets during the last 2-3 minutes of cooking.

Garnish and Serve:

Once the salmon is done, carefully remove it from the air fryer.

Sprinkle sesame seeds and thinly sliced scallions on top of the salmon for added flavor and presentation.

Serve your air fryer teriyaki salmon hot over a bed of steamed rice or with your favorite side dishes.