
You are absolutely right. Tomato conserva looks exactly like tomato paste. Tastes like it to, but only the way one could say that homemade gazpacho tastes like V-8.
I’ve been wanting to make this for years. Ever since my friend Max made it, wrote about it, and let me taste some. Tomato conserva is tomato paste, but freshly made by your own hands and with super-delicious tomatoes. Plus, as my dad said this summer when I elicited his opinion (that is, fished for a compliment) of the homemade butter I’d made: “Well, it’s just like everything, isn’t it? The homemade kind is always better.”
Words to live by. At least words for me to live by.
So my dashing husband has been raving about these super sweet tomatoes our market has been selling recently, then the price dropped to $2.50/lb, then I found myself unable to concentrate on words and keyboards and screens yesterday morning and turned my attention to the 5-lb. pile of tomatoes on the counter.
I followed the same basic method Max used, which is the method Paul Bertolli outlines in his inspiring Cooking by Hand. Unlike Max, I would like to note, I didn’t fall asleep while baking down the paste. In the spirit of honesty, full-disclosure, and embarrassing moments in cooking that are at the heart of this blog as much as is good food, I should also note that I did go out on a quick errand while the conserva was baking and almost forgot all about it. I am extremely grateful I sensibly decided to get the produce I was buying home and put away before embarking on the jaunt across town to pick up a sewing machine part that had suddenly occurred to me as the perfect thing to do on a day when I couldn’t concentrate anyway while I was at the store. After that, I stayed put. The sewing will have to wait for the next time driving across town into the fog sounds like a good idea.
First you rinse and cut up the tomatoes – Bertolli wants you to dice them but since they get cooked and run through a food mill that seemed unnecessary to me so I just halved them instead and tossed them in a very large, heavy pot:

Then you add a bit of olive oil (I used about 1/4 cup) and salt (about a teaspoon) and bring the whole thing to a boil and simmer for about three minutes:

Then you run the whole mixture through a food mill:

I wasn’t in the mood to dirty up more dishes than necessary, so I didn’t test and see if just pushing the half-cooked tomatoes through a sieve or colander would work just as well. My guess is it would work fine, just be messier and more work – what you’re doing is both turning the tomato flesh into a pureed pulp and getting out the skin and seeds:

Now – and this is all rather fun, I thought – you pour the tomato mixture onto a large, rimmed baking pan (if you only have smaller pans you may need to use two:

Carefully put the sheet in a 300° oven. Bertolli recommends convection and I bet that would be great, but I don’t have one and it turned out fine. Bake, stirring the mixture every 30 or 40 minutes or whenever you think of it – make sure you really scrape up the edges and work them into the mixture as a whole each time – for about 3 1/2 hours (convection would take less time):

Reduce heat to 250° and bake until “thick, shiny, and brick-colored.” I had a hard time imagining how that was going to happen when this whole thing started, but Bertolli is right, that’s exactly how it looked after another 3 hours in the oven:

See how shiny it got? The transformation sort of floored me. My dashing husband was working at home and I made him come down and see just how very shiny it was. Since he, too, had thought that description unlikely when I had read the recipe to him earlier (he really does humor me a great deal). He did a lovely job of feigning interest and delight.
I let it cool and then transferred it to three half-pint jars, leaving plenty of room at the top for a protective layer of olive oil. At that point I realized I could have cooked it down a bit more – then it would have made an amount that would have pretty much filled two half-pint jars perfectly. But I’m okay with the somewhat goofy amount in each jar. If I were a more patient person I would have gotten more of the air bubbles out of each jar, but I’m really just not very patient. Plus all the methods I know for doing that with jams and pickles didn’t work with this stuff – it is sticky and gooey and quite frankly not super-cooperative about being put in jars.
Olive oil went on top, lids were screwed on, and the jars popped into the fridge where they will wait, quietly, for us to gobble them up. A tablespoonful into a sauce here, a thin layer spread on crostini there… I’m thinking I better make another batch. Seems like this would be perfect for hot-water processing so it would be shelf-stable, doesn’t it? Bertolli is mum on the subject. Any canning experts out there have two cents to share?




James Walsh | 04-Sep-09 at 11:51 am | Permalink
I did this a while ago with some tomatoes that I got at a very good price in the local discount food store. I didn’t bring it down to your stage. I divided it up when it was cooked and put the mix into several flattened ziplock bags. Then I froze the flattened bags and stored them on top of each other. Now when I need to add some tomato concassee to a dish I just break or cut some off and add it to whatever I am doing.
Very nice job you did. I will do that with my next batch.
Jessica Battilana | 04-Sep-09 at 12:46 pm | Permalink
Now, I don’t mean to be a hater. Because this looks really good. And as you know, math is not my strong suit. But are you really suggesting that your loyal readers ought to spend $12.50 and 3 hours on 1 pint of tomato paste?
Molly Watson | 04-Sep-09 at 2:04 pm | Permalink
James – love the freezing idea. Even if one cooked it to the stage I did, this could be frozen in handy small ice cubes trays or something.
Jessica – I’m not really suggesting anyone do anything
. This project is most definitely *not* for everyone. (Maybe not even anyone.) I spent $12.50 and more like 6 hours (most of that extremely inactive) and couldn’t be happier. It is so much more than tomato paste. I’ve never wanted to spread tomato paste on toast, for example, but have done so with this.
Jenn | 05-Sep-09 at 8:49 am | Permalink
Molly,
If you’re looking for a good canning resource check out Putting Food By. There are others, but this one is very thorough and errs on the side of extreme caution (being a control freak and not wanting to give my loved ones botulism, I like this). Putting Food By recommends hot packing the paste into half pint jars, leaving 1/4 inch headroom. Adjust lids, process in a B-W bath (212 F) for 35 min. (note: longer if you’re above 1,000 ft – I did 40 min).
I actually made traditional tomato paste from my own heirlooms last month and canned it. I didn’t bake mine, but did it on the stove and it took forever, but you’re right – so satisfying. I actually only got a half pint but I did some whole tomatoes along with the paste.
esme | 08-Sep-09 at 5:43 am | Permalink
Having made this a few years ago (following Max’s recipe) and having received a jar from Max as a gift (a really big deal, BTW, the dude is not inclined to share this stuff, its more precious than gold), I would say its really more like a savory tomato jam then tomato paste. Of course you can use it as you would paste, but there is nothing better than eating it on toast (or on a grilled cheese sandwich).
Molly Watson | 09-Sep-09 at 10:27 am | Permalink
Jenn – thanks for the canning info and resource!
Esme – you’re right, tomato jam is a much better way to describe this stuff.
Lisa (dinner party) | 09-Sep-09 at 10:28 am | Permalink
Hi Molly! I’m not a canning expert (just a hobbyist) but I agree that you probably could process it in hot water, maybe for even less time–like 10 minutes?
Glad to have found your site!
Molly Watson | 09-Sep-09 at 10:45 am | Permalink
Thanks Lisa! Here’s the thing I’m wondering about: I’ve heard you’re not suppose to add olive oil to tomatoes you can. Anyone know if this is true? Or is it a mix-up of the don’t keep garlic in olive oil issue?
Hank | 11-Sep-09 at 3:52 pm | Permalink
Yep. It is a mix-up. I make ‘strattu — in fact will be posting on it in a few days when it’s done — and I never bother to process the jars. My conserva is tighter and drier than Bertolli’s conserva and never goes bad at room temperature, so long as olive oil is over it. It does have salt in it, BTW.
For Bertolli’s recipe, which I have made many times, top with 1/2 inch of olive oil and process for 10-15 minutes. The 35 minutes “Putting Food By” suggests is a bit much.
Molly Watson | 11-Sep-09 at 6:34 pm | Permalink
Thanks Hank – I had a feeling you would have the answer and I wouldn’t have to go to all that hassle of googling it. Thanks! I’m going to make another batch this weekend and try processing it.
paula | 12-Sep-10 at 8:29 pm | Permalink
one of the key issues with canning tomatoes is the pH. citric acid needs to be added to avoid the dreaded botulism.
Molly Watson | 13-Sep-10 at 5:55 am | Permalink
I read a recipe for canned tomatoes that insisted one use bottled lemon juice for the known pH level (as opposed to fresh lemon juice, which can vary) and that level of precision needed made me think I’ll just stick with my freezing tomato sauce method!
cari | 13-Sep-10 at 1:50 pm | Permalink
I made this from Bertolli’s book two years ago. I spent way more than you did, both in cash and time and ended up with about four ounces of what I called gold paste. I could not have been happier about the project. It was worth every single penny, every single minute. There is just something remarkably satisfying about the process of long, slow days in the fall kitchen. Great post!
Molly Watson | 14-Sep-10 at 3:39 am | Permalink
Yes, I think of it as like gold but more precious! So glad you find the process as I do – long, slow, and completely and utterly worth it.
Heirloom Tomatoes- A Man’s Munch. | thekitchensgarden | 14-Aug-11 at 8:24 am | Permalink
[...] tomato conserva If you have a day at home, go for it, the results are fantastic. I am making jars of this .. it is divine. [...]
Old Route 66 Service Stations should have served Mama’s Lasagna! | thekitchensgarden | 24-Aug-11 at 5:55 am | Permalink
[...] When you are almost done add a jar of tomato conserva or a little tin of tomato paste. Not yet though. Your sauce may catch on the bottom of the pot [...]
June | 15-Sep-11 at 10:42 am | Permalink
You would be best to pressure can your tomato paste. They no longer recommend water bathing for tomato product that does not contain higher amounts of acid. Gone are the days of water bathing tomatoes. I remember growing up and checking for jar lids that were bulging because of them spoiling. I really wonder how much “flu” really hit our house or was it the tomatoes.
Jessie | 16-Sep-11 at 9:19 am | Permalink
Do you think you could do this recipe in a crock pot rather than the oven? I’ve had a lot of success making apple sauce and other “oven recipes” in a slow cooker and this would work much better with my schedule. It sounds delicious!
Molly Watson | 18-Sep-11 at 9:57 am | Permalink
Thanks June! Hear that everyone? No water-bath processing for this conserva (it never lasts long enough at my house to do anything but stick it in the fridge with a slick of oil on top anyway!).
Jessie – you are cooking it down and reducing it, not just cooking it a long time, so I’m not sure how well the crock pot would work. You could always try it and if, at the end of the day, it wasn’t reduced enough finish off in the oven before you went to bed….