In a medium bowl lightly beat the egg whites, add the parmesan cheese and combine well. Form the mixture into 10 grams / ⅓ ounce size balls and place on a parchment paper lined baking sheet. Chill for 20-30 minutes.

Deep fried in oil heated to 350F / 180C, turning after 2-3 minutes until golden, move to a paper towel lined dish and serve.

Bake in a 350F / 180C pre-heated oven for 18-20 minutes or until golden. If you wish you can flip the balls halfway through baking to ensure they are crispy on all sides.

Bake in an air fryer, pre heat air fryer to 375F / 190C according to manufacturer's instructions. Place parmesan cheese balls in the air fryer basket and spray with olive oil. I line mine with foil and lightly spray the foil also. Cook in the preheated air fryer for 5-6 minutes. Increase temperature to 400F / 200C and air fry for 2-3 more minutes or until golden and baked.