University of Maine Cooperative Extension will offer an online class on dehydrating and freezing for food preservation from 6–7:30 p.m., Sept. 23.  Learn how to safely preserve foods by blanching and freezing, or by using a food dehydrator. Freezing instructions and a dehydration food guide will be emailed following the webinar.  Registration and a $5 read more UMaine Extension offers webinar about dehydrating and freezing for food preservation Sept. 23