I'm canning some crushed tomatoes, using Mrs. Wheelbarrow's method from NPR. My canner's instructions say to place the lidded-up jars in the canner, make sure they're covered by more than an inch of water, and bring to a "vigorous boil."
I've got the stove up as high as possible, and after 30 minutes it's nowhere near a vigorous boil. Can I just lid up the canner and proceed as instructed?
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