Our grandmothers made "putting up" look super easy, but there are some crucial canning commandments ... to use your oven. It heats unevenly and might result in improperly sealed jars.

Use oven mitts, pot holders or thick cloths to handle hot jars. Keep your fingers away from the rims once jars are sterilised. Scald a clean cloth for wiping. I have a few old clean tea towels ...

This method of oven-canning is both simple and effective ... Peel off the skins and core the tomatoes if desired. Sterilize ...