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Canning Whole Peeled Tomatoes

pile of tomatoes

Before tomato season comes to a close, I want to talk about my favorite way to preserve tomatoes. I typically only can them one way – (mostly) whole and peeled, in their own juices. I do them this way because I like the versatility they retain when put up in this manner. Later down the line, I can choose as to whether I want to puree them down, make a chunky sauce or just crush them with my hands and use them to top homemade pizza (Mmmm).

One thing to note is that my tomatoes aren’t perfectly whole. I do crush them a bit while cramming them into the jars, in order to generate enough liquid to totally cover the ‘maters. I find that I’m able to get three romas into a pint jar and six into a quart. On occasion, I’ll cut a tomato in to thirds or halves in order to finish off a jar and still have the proper amount of headspace.

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Take your tomatoes and core them. This isn’t an absolutely necessary step, but I hate dealing with the cores when it comes time to use the tomatoes on the other end.

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A cored tomato. Seriously easy.

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Make two shallow cuts on the bottom of the tomato, to ease the peeling.

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Drop cored and scored tomatoes into a pot of boiling water (don’t put too many in at once, or you’ll drop the water temperature drastically and it will take forever to return to a boil). Blanch tomatoes for 1-2 minutes, until the skins start to blister or loosen.

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Put your blanched tomatoes into a boil of cold water, to halt cooking and to make them handle-able.

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Peel tomatoes. The skins should slip off easily after the blanching and the cold water dip.

filling jars

I put the tomatoes into the jars as I peel. Two standard sized romas typical fit at the bottom of the jar.

smashing tomatoes

You may need to give them a little help. I use my hand when filling wide mouth jars, but when dealing with regular mouth openings, I employ the handle of a wooden spoon.

full jar

Look! A jar that’s filled with tomatoes! All the liquid you see here came from the tomatoes, as I gently smashed them to fit the jar.

2 tablespoon measure

Don’t forget to acidify. It’s one tablespoon of lemon juice for pints and two for quarts. I pour it on top of my filled jars, and then use a chopstick to remove the air bubbles from the jar and work the lemon juice down into its contents. You should have approximately 1/2 inch of headspace remaining after you add the lemon juice and de-bubble the jar.

After that, I wipe the rims, apply my lids (carefully simmered for 10 minutes at around 180 degrees), screw on the rings and lower the jars into the heated boiling water canner (remembering to use a rack so that the jars aren’t resting on the bottom of the pot).

Quarts of whole peeled tomatoes get processed in a boiling water canner for 45 85 minutes. Pints get processed for 40 minutes the same amount of time. Tomatoes that are packed in water are processed for 40/45 minutes.

Because my life is busy, I rarely do my tomatoes in one great, big canning day. Instead, I stretch the process out over several post-work weeknights. I’ll do four quarts at a time, because that’s how much my stock pot can hold during processing, and it keeps me from feeling overwhelmed. I find that a 25 pound box of tomatoes will make approximately 12-14 quarts of tomatoes, and so I do four jars a night for three nights in a row. It keeps me sane and keeps my pantry filled with wonderful, local tomatoes all winter long.

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