Step 1: Prepare the Salmon. Pat the salmon fillet dry thoroughly with paper towels. Remove any pin bones if present. Cut the salmon into 1-inch cubes. Try to make them as uniform as possible for even cooking.
Step 2: Make the Marinade. In a medium bowl, whisk together the soy sauce (or tamari/coconut aminos), maple syrup (or honey), rice vinegar, minced garlic, grated ginger, and sesame oil.
Step 3: Marinate the Salmon. Add the cubed salmon to the bowl with the marinade. Toss gently to ensure every piece is thoroughly coated. Let it marinate for at least 10-15 minutes at room temperature, or up to 30 minutes in the refrigerator.
Step 4: Preheat Your Air Fryer. Preheat your air fryer to 400°F (200°C) for 3-5 minutes. Lightly spray the air fryer basket with cooking spray to prevent sticking.
Step 5: Air Fry the Salmon Bites. Arrange the marinated salmon bites in a single layer in the preheated air fryer basket. Do not overcrowd the basket; cook in batches if necessary. Cook for 8-12 minutes, shaking the basket gently halfway through, until the salmon is opaque throughout and flakes easily with a fork, with a beautiful golden-brown, slightly crispy exterior.
Step 6: Garnish and Serve. Carefully remove the salmon bites from the air fryer. Garnish with a sprinkle of sesame seeds and freshly chopped green onions. Serve immediately.