Preheat your air fryer to 375°F (190°C) for about 5 minutes to ensure it’s adequately heated. This step helps in achieving a crispy texture for your stuffed peppers.

Take your package of Costco stuffed peppers and place them in a single layer inside a small metal baking tray that fits comfortably in your air fryer. For reference, an 8-inch by 8-inch by 1.5-inch aluminum pan (20cm by 20cm by 3.8cm) should work well.

Cover the metal pan with foil, ensuring to mist the underside of the foil with your preferred cooking spray. This prevents the peppers from sticking to the foil during cooking.

Once the air fryer is preheated, carefully place the covered metal pan with the peppers inside the air fryer basket.

Air fry the peppers in the middle of the air fryer for approximately 45 minutes. However, check on them every 15 minutes to avoid overcooking, as they might be done earlier.

To ensure the peppers are thoroughly cooked, use a thermometer to check if they’ve reached an internal temperature of 165°F (74°C).

If desired, sprinkle 3 tablespoons of grated Parmesan cheese over the stuffed peppers during the last few minutes of air frying. This step adds extra flavor and a delightful cheesy finish to the peppers.

Once the stuffed peppers are cooked to perfection, carefully remove them from the air fryer using oven mitts or tongs.

Allow the peppers to cool slightly before serving. They can be enjoyed as a delicious appetizer or as a main dish alongside your favorite sides.

After enjoying your delicious stuffed peppers, remember to clean your air fryer and any utensils used for cooking. This ensures everything is ready for your next culinary adventure.