Preheat thermal equipment: Set conventional oven to 425°F (220°C) or preheat air fryer to 400°F (200°C).
Mechanical preparation: Rinse, peel, and dice the sweet potatoes into precise 1-inch (2.5 cm) cubes to facilitate even heat distribution.
Seasoning application: In a large non-reactive mixing bowl, combine the cubed potatoes with olive oil, salt, pepper, garlic powder, and smoked paprika. Toss until all surfaces are thoroughly emulsified with oil and spices.
OVEN METHOD: Distribute the cubes in a single layer on a heavy-gauge baking sheet lined with parchment paper. Roast for 25 to 30 minutes, agitating the cubes with a spatula at the 15-minute mark to promote uniform browning.
AIR FRYER METHOD: Transfer the cubes to the air fryer basket, ensuring no overlap to allow for optimal airflow. Process at 400°F (200°C) for 12 to 15 minutes, shaking the basket every 5 minutes until the exterior reaches a crisp state.
Quality control: Verify doneness using a fork to confirm the core is tender. Remove from heat and serve immediately to maintain structural integrity.