1. In a large bowl, toss the diced potatoes and sliced onions with olive oil until they are evenly coated.2. Add the garlic powder, paprika, dried thyme, salt, and black pepper to the bowl. Toss again until the potatoes and onions are well-seasoned.
3. Preheat your air fryer to 400°F (200°C). Place the seasoned potatoes and onions in the air fryer basket in a single layer. Depending on the size of your air fryer, you may need to cook them in batches.
4. Cook for 15-20 minutes, shaking the basket halfway through cooking to ensure even crisping. The potatoes should be golden brown and crispy, and the onions should be caramelized and tender.5. Remove the potatoes and onions from the air fryer and transfer them to a serving dish. Garnish with fresh parsley if desired and serve immediately.