In A Year in an Off-Grid Kitchen I included recipes for five of my favourite ways to preserve tomatoes with water bath canning – as tomato passata, tomatoes in brine, pizza sauce, salsa, and tomato relish. I’ve recently tried a couple of different methods that I’d like to share here.

Fermenting tomatoes

I’ve been intrigued about fermenting tomatoes for a while, ever since reading Shannon Stonger’s Traditionally Fermented Foods. it seems like such a simple and low energy way to preserve tomatoes, and perfect for preserving the garden harvest as it makes it to the kitchen, because you don’t need a huge amount of tomatoes to justify boiling up the canner, you can just preserve one jar at a time. Tomato season is a busy time on the homestead, and having a way to just quickly preserve things without much fuss is very welcome!

I tested this recipe out, left them alone for nearly a year, and they were still good to eat after that long. Tomatoes are a bit naughty in the jar and have a habit of rising above the fermenting weight (which is why in the photo you can see lots of tomatoes trying to jump out of the jar!), even then in my Fido jar, they were still really good to eat. I definitely recommend checking out Shannon’s fermenting book for more tasty fermenting recipes.

How to ferment tomatoes:

Pack whole, firm tomatoes up to the ‘shoulders’ of a fermenting jar – I use Fido jars, but mason jars can work too if you remember to ‘burp’ them once a day for the first week or two, or until the bubbling stops.

Add around 3 tablespoons unrefined salt, plus an optional tablespoon of fresh whey or sauerkraut juice for every litre (quart) jar.

Top with non-chlorinated water to above the level of the tomatoes

Weigh the tomatoes down with a fermenting weight, or with a cabbage leaf weighed down with a boiled rock or other heat-sterilised heavy thing.

Put the lid on and leave it at around 23ºC (73ºF) for a week or two, or until the bubbling dies down, then move to root cellar, larder, or fridge conditions of around 15ºC (59ºF) or lower where they will store for up to a year.

Use these fermented tomatoes anywhere that you’d normally add tomatoes – salads, soups, stews, sauces, and more. This is a great low energy way to preserve tomatoes.

Drying tomatoes

One of my favourite tomato varieties to grow is Principe Borghese, In my garden, this is a resilient variety that fruits very early, produces an abundance of tasty red cherry tomatoes that are great either raw or cooked, and it seems pretty resistant to pests. Last tomato season here was rainier and colder than usual, and I grew both this and “Gold Nugget” which is the earliest fruiting tomato that I know of, and Principe Borghese was the first to have ripe fruit, and was very plentiful. It’s also grown well for me in dry warm summers.

Principe Borghese is well-known as a good tomato for drying, but I’ve never grown it for that reason, just for all the reasons above. Last season I experimented with drying them in the wood stove.

How to dry tomatoes:

Slice them in half. Place them cut-side up on a baking sheet. Put them in a very low oven with the door ajar – I dried mine at the bottom of the top oven of the wood stove as it died down for the night, and also in the warming oven all day. Once the tomatoes have mostly dried out on that side, flip them over and dry the other side.

Once the tomatoes are fully dry, they will be crispy and full of flavour.

Tomatoes can also be dried in a solar dehydrator in a similar way – just dry cut-side up until that side is almost dry, then flip over and dry until crisp.

Tomatoes with more flesh and less juice and seeds, such as Amish Paste, Roma, Principe Borghese, and other sauce-type tomatoes are the best choices for drying, but any tomato can be dried in this way.

Store dried tomatoes an airtight container such as a glass jar with lid. If kept dry, they will keep well for a year or more.

Dried tomatoes are great smashed up and sprinkled on salads, on top of pizza, or added to stews, soups, sauces, and more.

For more recipes and ideas for cooking and preserving homegrown tomatoes, see my book A Year in an Off-Grid Kitchen