Start by cutting the skinless salmon filet into 1-inch cubes, ensuring they are of even size for uniform cooking. Place the salmon cubes in a mixing bowl and sprinkle with kosher salt and freshly ground black pepper. Gently toss the salmon in the seasoning until each piece is evenly coated.

In the same bowl, add the melted butter, lemon juice, and minced garlic to the seasoned salmon. Carefully toss the mixture until all salmon bites are well coated in the garlic butter sauce.

Preheat your air fryer to 400°F (200°C). Line the air fryer basket with parchment paper, then arrange the salmon cubes in a single layer. Air fry for 5 to 7 minutes, or until cooked through and lightly browned.

Once golden and fragrant, remove salmon bites from the basket. Enjoy on their own or on top of fresh salads or grain bowls, drizzled with leftover garlic lemon butter sauce.