Lazy Budget Chef website shares how to oven can and preserve dry goods for long term food storage. There a couple reasons to seal mason jars with the oven
Self Reliant Network: Oven canning preserves dry goods for years. I love the idea of grating carrots, dehydrating them, then oven canning them.
How to Sterilize Jars in the Oven 225 degrees for 10 min, then turn off oven but leave jars to keep warm until ready to use
Oven Canning, Dry Canning, long term food preservation for dry goods. NOTES: About 8 cups of volume to get inch head space
Lazy Budget Chef: How to Oven Can and Preserve Dry Goods