Air-Fryer French Toast Sticks

Whisk eggs, milk, sugar and vanilla together in a wide shallow dish. Cut bread slices into thirds lengthwise (24 pieces total). 

Preheat air fryer to 325°F for 3 minutes. Lightly coat the basket with cooking spray. Working in batches, dip 8 bread sticks in the egg mixture, flipping constantly, until completely soaked, about 15 seconds. Arrange the soaked bread sticks in an even layer in the prepared basket; coat with cooking spray. Cook, flipping and coating with additional cooking spray halfway, until golden brown and interior is no longer wet, about 10 minutes. Transfer to a platter and cover with foil to keep warm. Repeat the process 2 more times with the remaining bread sticks and egg mixture.