How Do You Use a Water Bath to Can Stewed Tomatoes?

To can stewed tomatoes in a water bath, take the skins off firm tomatoes, boil them in water, and fill the canning jars with the stewed tomatoes. Put the filled canning jars with their lids on into a bath of hot boiling water, and ensure the canning jars are covered by 1 to 2 inches of water. Boil the jars for 35 to 45 minutes depending on their size.