Set your air fryer to the appropriate temperature, typically around 375°F (190°C), and preheat it for a few minutes.
Wash and chop the veggies into bite-sized pieces. If using uncooked sausages, you can leave them whole or chop them into chunks.
Tear off a piece of aluminum foil large enough to hold the sausage and vegetable mixture. Place the sausages and veggies in the center of the foil.
Drizzle some olive oil over the sausages and veggies, then sprinkle with garlic powder, dried oregano, salt, and black pepper. Toss everything together to coat evenly.
Fold the sides of the foil over the sausages and veggies to create a packet. Ensure it's tightly sealed to prevent any steam from escaping during cooking.
Carefully place the foil packet in the air fryer basket, making sure it's not too tightly packed and there's enough space for air circulation.
Cook the sausage and veggie packet in the air fryer at 375°F (190°C) for about 15-20 minutes. Cooking times may vary depending on the thickness of sausages and the density of the vegetables.
Open the foil packet carefully to check if the sausages are fully cooked (reaching an internal temperature of 165°F/74°C) and the vegetables are tender.
Transfer the contents of the foil packet to a serving dish. If desired, garnish with fresh parsley for an extra pop of color and freshness.