In a large bowl, combine the soy sauce, honey, rice vinegar, garlic, ginger, red pepper flakes, and black pepper. Add the pork cubes and toss to coat. Cover and refrigerate for 30 minutes.
In a shallow dish, combine the cornstarch and flour. Dredge the pork cubes in the flour mixture, shaking off any excess.
Heat 1 tablespoon of oil in the air fryer basket. Add half of the pork cubes and cook for 8 minutes, until golden and crispy. Transfer to a plate and repeat with the remaining pork cubes.
Meanwhile, in a small saucepan, combine the pineapple juice, ketchup, brown sugar, water, and cornstarch. Bring to a simmer over medium heat and cook, stirring constantly, until thickened, about 3 minutes. Add the diced pineapple and stir to combine.
Drizzle the sauce over the cooked pork and serve.
Interesting Facts
Pineapple juice is a great substitute for white vinegar in sweet and sour sauces.
A good way to get extra crunch from air-fried pork is to double-dredge it in the flour mixture.
This dish is a great way to use up leftover pork tenderloin.