Begin by cutting the chicken breasts into 1-inch cubes and the broccoli into florets. This ensures even cooking and makes for perfect bite-sized pieces.
In a mixing bowl, combine the chicken cubes with half of the teriyaki sauce, and sprinkle with salt and pepper. Give it a good toss to ensure every piece is well-coated. Let it marinate for about 10-15 minutes for maximum flavor.
Preheat your air fryer to 375°F (190°C). This step is essential as it helps to achieve that crispy exterior on your chicken and perfectly cooked broccoli.
Once the air fryer is preheated, add the marinated chicken cubes in a single layer in the basket. Air fry for about 10 minutes, shaking the basket halfway through to ensure even cooking.
After 10 minutes, carefully add the broccoli florets to the air fryer basket with the chicken. Drizzle the remaining teriyaki sauce over the broccoli, and toss gently to combine.
Air fry the chicken and broccoli together for another 5-7 minutes, or until the chicken is cooked through and the broccoli is tender and slightly crispy.
Remove the chicken and broccoli from the air fryer and serve them over warm cooked white rice. Drizzle with any leftover teriyaki sauce if desired, and enjoy your delicious meal!