Wash and dry the basil leaves.

In a large mouth jar or freezer-safe container, begin adding basil leaves, a few at a time.

Next, drizzle with some good quality extra virgin olive oil. DO NOT FILL THE JAR WITH OIL, just drizzle at this point.

Continue with this process, adding leaves and oil, occasionally pushing the leaves down gently with a fork. Don’t worry about the basil popping up and lots of air in the jar.

Once you have a significant part of the jar filled, place it in the freezer for about 20 minutes, or until the leaves begin to freeze. This will make it easier to push the basil down and have it stay down. Repeat these steps as needed.

When the leaves are pushed down completely, and as much has been added as fits in the jar, then add enough olive oil to cover the basil and freeze completely. Do not fill the jar too close to the top.