1. Place the beef strips in bag. Combine the onion, garlic, chipotle chile, adobo sauce, seasonings, olive oil, salt, pepper, and water. Pour the marinade over the meat and combine. Marinate at room temperature for 30 minutes. 2. Using tongs, remove the beef strips from the bag and lay them flat in the air fryer basket. Set the air fryer to 400°F  for 8 minutes.