How can I safely freeze egg yolks for future use?

To safely freeze egg yolks for future use, first separate the yolks from the whites. Add a pinch of salt or sugar to prevent them from becoming too gelatinous. Place the yolks in an airtight container or freezer bag, making sure to remove as much air as possible. Label the container with the date and number of yolks. Freeze for up to 3 months. Thaw in the refrigerator before using.