1. Pour 3 cups of water into the bowl. Place eggs in the steam basket and place the basket in the Prep&Cook bowl. Launch the P1 steam program for 20 minutes. At the end of the program, let eggs and bowl cool.
2. Place the raw egg yolk, mustard and vinegar in the bowl fitted with the whisk. Season with salt and pepper. Launch at speed 7 and gradually pour in the oil. Once the mayonnaise is ready, stop the Prep&Cook.
3. Separate the cooked eggs. Place the yolks in a separate bowl and the whites on a plate. Mash the yolks with a fork and add desired amount of mayonnaise mixture; mix well.
4. Fill egg white halves with the yolk mixture and garnish with sprigs of chive. Cover and refrigerate remaining mayonnaise.