In a large bowl, combine all ingredients and mix well. If meatballs are too dry, add a teaspoon of water at time until mixture holds shape.
Use a medium cookie scoop to portion 25 meatballs. Roll each into a ball.
Brush your air fryer with oil or line the air fryer with a piece of parchment paper. Place meatballs in the basket in a single layer.
Cook at 400 degrees for 8 minutes or until the center of the meatball reaches 165 degrees.
Remove the cooked meatballs to a plate and cover with foil while cooking any remaining meatballs. Meatballs are best after they have rested for about 5 minutes.
Serve with an additional drizzle of buffalo sauce. Garnish with chives or green onions, if desired.