The Five Very Best Tips for Preserving Tomatoes

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instagramoneby Laura Parker Roerden

My first experiments with preserving tomatoes involved burnt fingers, cuts, and a bloody looking mess of tomato waste everywhere that reminded me of that classic Julia Child SNL skit.

Fortunately, canning does not have to be a horror show. Over time and with the help of my fellow canner and friend since first grade Jane Clarke, I have learned that you do NOT really need a “a very sharp knife” to can like a pro. (Okay, you do need a paring knife, though.)

So grab an apron and pretend that you’re a 19th century midwife on the prairie. There’s a lot of boiling water involved.

Friends do not let friends seed tomatoes.

Here are our Five Very Best Tips for Preserving Tomatoes; as well as the Process for Canning and My Very Own Sauce recipe.


Five Very Best Tips for Preserving Tomatoes

1. Buy silicone gloves, which will allow you to submerge your hands into boiling water. Now that is sort of cool just in and of itself. But really you will buy them because hot pads eventually will get soaked through with water and scald you. It’s the best $20 investment you’ll ever make.

2. Freeze your tomatoes whole as they come out of the garden to deal with WHENEVER you want. When you take those frozen balls of sunshine out in January (when you’re ready to deal with them and heating up your kitchen doesn’t feel like a punishment) you can pour boiling water over them and their skins will slide off faster than a prom dress. (Okay, that’s Christine Gervais’ go-to line, so you can blame her for it.)

A freezer drawer lined with paper makes a great basket for picking your tomatoes and can be put directly into the freezer.

3.  Make tomato sauce in your crock pot and freeze or can. This might seem obvious, but I was five years into preserving tomatoes before Raelene Hourany posted on her Facebook page that she uses her crockpot to make tomato sauce and it’s been the Best. Thing. Ever. I can’t tell you how many burnt bottoms of pans in my cabinets mocked me until I pulled that slow cooker out. And you will feel so liberated to be able to leave your house without burning it down while your sauce does it’s slow and earthy dance.  (See My Very Own Tomato Sauce recipe.)

4. Buy a dehydrator. I spent many years trying to oven roast cherry tomatoes and then packing them in oil in messy freezer bags that I later never used. The tomatoes never fully dried; my oven and my kitchen would ooze moisture from leaving the oven door cracked open. Notwithstanding how good all that moisture might be for your skin, I now dry my cherry tomatoes in a dehydrator. They come out tasting like candy–and for a fraction of the energy cost. And you can dry store them for later reconstituting for soups, stews, and pastas.

5. Do not seed. That’s right. As I said to my dear friend Andy Parker when he was seeking advice, “Friends do not let friends seed tomatoes.” Whew! I bet you feel better. I know I do.

(BONUS: And while I can’t actually call this a tip because it involves other work, there is a great benefit to having chickens to feed your tomato peels, cores and discarded remains to.)


Process for Canning Tomatoes

What You’ll Need
a paring knife : )
silicon gloves (see Tip #1 ) or tongs that can hold a full canning jar
a large pan (like a Lobster Pot)
a wire canning wrack
a large shallow baking pan that will fit your sink
pans for boiling water
salt (sea salt preferred)
basil (or any herb from your garden or farmers market—this is where you can be creative)

1. Take a large pan (a lobster pot works great!), put in your wire basket insert for the cans, fill with water to about 3/4 capacity and start it boiling on your power burner. Fill other pans with water to utilize all of your burners and start them on high to boil the water.
2. While you wait for the water to boil, rinse the tomatoes in the shallow pan in the sink. You can pour the water off after rinsing and repeat.
3. Fill the pan in the sink with boiling water to scald the tomatoes. Leave the tomatoes to sit in the boiling water while you do the next step.
4. Fill each glass “can” with boiling water to sanitize. (Or you can do this in your dishwasher, but you’ll less energy if you sanitize the ol’ fashioned way.)

5. Now you can pour off the hot water from your pan of tomatoes–which will be ready to peel. Add some cold water to cool them before touching.
6. Peel, core, and cut off any bruises. You should be able to do this with a simple paring knife.

7.  Pour off the water from your sanitized cans and with your clean hands start inserting the peeled and whole tomatoes into your sanitized jars. Press the tomatoes down as you insert more to fill any air pockets. Plunge a knife down the sides of the jars to push tomatoes into any remaining air pockets. Fill to the rim of the can.

8. Finish with a teaspoon of sea salt and a sprig of your herb of choice.
9. Put the top on your canning jar and tighten with your rim.
10. By now your lobster pot water is hopefully boiling. Remove the canning insert and fill with cans. Wearing your silicone gloves, lower the cans until submerged by boiling water, resting the rack against the edge of the pan.
11. Pay attention to when the water in the lobster pot begins to reboil. From the reboil, time 45 minutes for the whole tomatoes to heat through. (If canning already prepared tomato sauce, heat up the sauce until uniformly warm, and follow steps 4, and 9-11).
12. Remove cans individually from the wire insert with silicone gloves (or tongs). Retighten tops and leave to cool on a counter top. You will hear a “pop!” as each individual can seals. This can take several hours.
13. Tap the lids of your cans. You ‘ll know that you have a good seal if you hear a “ping” instead of a “thud.” Don’t despair if you have a couple cans that still sound “thud” in comparison to the others after many hours of waiting (12 or more). These can go into your refrigerator for first use.

My Very Own Tomato Sauce
garlic head (fresh)
olive oil
fresh herbs (a tsp each of basil, thyme, oregano, and sage.)
20-30 plum tomatoes (or Your Very Own Canned Tomatoes)
1/2 bottle of red wine (something light or medium like a Beaujolais or Pino Noir)
organic carrots
a small onion

1. Drizzle garlic oil on peeled (or not–because they are organic, right?) carrots, a cut-up onion, and about 8 good cloves of garlic. Roast at 325 for about 45 minutes.
2. While you are roasting the carrots and garlic, scald, core, and peel your tomatoes. (Following steps 2, 3, 5 and 6 from above.)
3. Puree roasted carrots, onion, and garlic in a food processor.
4. Combine peeled tomatoes, wine, herbs, and roasted vegetables in a crock pot.
5. Cook on low for 8 hours.
6. With sauce warmed through, can as described above. Or you can simply freeze your tomato sauce for later use.



3 thoughts on “The Five Very Best Tips for Preserving Tomatoes”

  1. First of all, I gasped audibly when I read that quote! haha. Now, for the thanks! I just may try this canning thing! Our ultra hot summer in Phoenix is finally coming to a close, and the farmers’ markets will soon be back in business. I am looking forward to finally trying this! Thanks for the demystification! AND thanks for the sauce recipe…AND (haha), thanks for the beautiful blog (and chicken pics. I love those birds!!!)

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