Once the mixture has cooled (around 10 minutes) using a dropper, squeeze out drops of the balsamic mixutre into the cold oil. If you don’t have a dropper, you can use a squeeze bottle with a small opening, it will just take longer. Leave the balls to harden for a few minutes, then using a spoon remove the balsamic balls and place into a very thin seive or tea strainer. Drop them into a cup of water to rinse and then drain again. Place in a bowl until ready to use.