For the mayonnaise, whisk yolks in a large, fat-free bowl with a fine whisk. Slowly stir oil into egg mixture. Season to taste with salt, sugar and mustard and round off with lemon juice, vinegar and stock. Important: All ingredients must be at room temperature!
Pour into a 0.5 L iSi unit. Screw on an iSi cream capsule and shake vigorously. Chill.
Preparation Tip:
To obtain a lighter mayonnaise, reduce the oil content slightly and increase the stock content.