Canning & Freezing Quick-Guides Bulletin #4382, Canning Vegetables In a Pressure Canner (PDF) Prepared by Ann Hamilton, Food Safety Field Specialist, University of New Hampshire; reproduced with permission. For information about UMaine Extension programs and resources, visit extension.umaine.edu. Find more of our publications and books at extension.umaine.edu/publications/. Pressure canning is the only recommended method for