In a bowl, combine the sliced mushrooms, avocado oil, minced garlic, salt, black pepper, and dried parsley. Toss until the mushrooms are evenly coated with the seasonings.
Preheat your air fryer to 390°F (200°C) for about 3-5 minutes.
Once preheated, place the seasoned mushrooms in the air fryer basket, spreading them out into a single layer.
Cook in the air fryer at 390°F (200°C) for 7-9 minutes, shaking the basket halfway through the cooking time to ensure even cooking.
After cooking, remove the mushrooms from the air fryer and transfer them to a serving dish.
Serve the garlic mushrooms immediately as a side dish or use them as a topping for salads, pasta, or rice dishes.