Pesto is an uncooked seasoning mixture that usually includes fresh basil, garlic, pine nuts and oil. It should be made fresh and stored in the refrigerator no more than 3 days. It may be frozen for long term storage. Package in glass freezer jars or plastic freezer boxes, leaving 1/2-inch headspace. Label and freeze.
This document was extracted from "So Easy to Preserve", 5th ed. 2006. Bulletin 989, Cooperative Extension Service, The University of Georgia, Athens. Revised by Elizabeth L. Andress. Ph.D. and Judy A. Harrison, Ph.D., Extension Foods Specialists.