Preheat the oven to 200C/400F.
In a large bowl, add the egg whites and cream of tartar. Whip with a hand mixer until stiff peaks form.
In a separate bowl, mix the mayonnaise, egg yolks, garlic and parsley with a hand mixer for a minute.
Gently fold the firm meringue into the yolk mixture in 3-4 batches. Try to deflate the meringue as little as possible, so the mixture is still firm and foamy.
On 1 or 2 baking sheets that are covered with parchment paper, add like a ¼ cup of the foam to make 12 even circles. You can also use a spoon to spread the mixture so that it looks more like a circle.
Place in the oven and bake for 20 minutes. Take out of the oven and let completely cool before picking them off the parchment paper.
Store in a plastic bag in the fridge.