When it comes to a project like this, seems to me there’s only two ways to go: 1) You can make just enough for yourself, and let’s face it, a little goes a fairly long way, or 2) If you’re going to bother with it at all, you may as well make a bunch, and share it with friends, neighbours, co-workers, etc. After all, you’re committing the same amount of time in either case, and in the latter mode, you can share the wealth. Sure, your cost of ingredients doubles, but by a back-of-the-napkin calculation, that came to about $12 in this case, less if you use red onion rather than Vidalia sweet onions, a cheaper wine, and can find a better deal on fresh figs than Whole Foods‘, all of which are well within pretty much everyone’s reach.
I’m going to say this up front, because food safety is paramount: THIS MUST BE REFRIGERATED. You can’t really preserve it in a standard water bath as you do other jams, because the pH isn’t low enough (or, put another way, the acidity isn’t high enough) to guarantee that our old pal Clostridium botulinum won’t rush in and ruin the day. The spore that causes botulism — and turns actresses of a certain age into Stepford Wife-looking creatures — is given a perfect home to reproduce in a fairly low-acid foodstuff that has been canned in an anaerobic (air-free) environment. You could get around this by adding a healthy dose of lemon or lime juice (or citric acid powder), but that would muck about with the flavour in a way that I wasn’t aiming for, personally. That said, if you do want to adjust the recipe and can it in the trad fashion, I’d recommend getting a pack of pH test strips and make sure you have the acidity at a pH lower than 4. Then the nasty little beastie is banished from the kingdom.
Now that I’ve frightened you, let me say that this is the same advice you’d get for canning meat, or asparagus, or mushrooms, or wax beans, or pretty much any veg that isn’t a tomato (and yes, I know a tomato is technically a fruit).
If, on the other hand, you have a pressure cooker/canner, you could do this no worries, so long as you get the canning temp above 240° F/115.6° C for a specific period (there are online guides), and it makes sense to err on the side of caution. Otherwise, you’re just going to have to treat it the same way you do pretty much everything else: put it in the fridge, and use it within 10 days or so. [Since it isn't going to be in an anaerobic environment, botulism isn't an issue, but as you well know, nothing in the fridge keeps forever... except that box of baking soda that doesn't really absorb the odors the way it's advertised to do.]
On to the good stuff.
This jam/conserve/very thick sauce is most excellent when served with stinky cheese, or as a glaze/condiment for a pork tenderloin, chops, or chicken. [Of course, since it's vegan, it's also good with crackers and flatbreads, not to mention garden burgers.] I tried to keep the sugar content as low as practicable, favouring the umami as much as possible.
FIG ONION ROSEMARY JAM/CONSERVE/VERY THICK SAUCE
45ml (3 tbsp.) extra virgin olive oil
3 large Vidalia sweet onions, sliced (about 1kg) (any onion can be substituted here)
5g + 1.25g (1 tsp. + 1/4 tsp.) sea salt or kosher salt
15g + 250g (1 tbsp. + 1 cup) turbinado sugar (white sugar works also)
1.25kg (2.75 lbs.) fresh Kadota figs (or whatever variety is convenient)
30ml (2 tbsp.) fig balsamic vinegar (or other balsamic vinegar or wine vinegar)
500ml (2 cups) red wine (2/3 of a standard bottle)*
15g (1 tbsp.) fresh rosemary, finely chopped
[Mise en place notes: Slice the onions and set then aside in a bowl; wash and destem the figs, then cut them in half (north/south) and set aside in a separate bowl. Chop the rosemary and set it aside. You can measure out your other moist and dry ingredients at this time if you want to, but nothing here is so time-sensitive that it's really necessary.]
Heat pan on high and add the olive oil; when oil begins to shimmer, add the sliced onions, 5g/1 tsp. salt, 15g/1 tbsp. sugar, and stir briskly, to coat onions with the oil and mix in the salt and sugar. Reduce heat to medium high and allow onions to caramelize, about 20 to 30 minutes. [Note: If you haven't done this before, it's a little tricky. Stir them too often, and they don't brown up. Stir them too infrequently, and they can burn. Don't freak out if a couple of the onions look overdone; not a big deal. Timing is approximate depending on the amount of onions, your pan, and the heat of your cooktop.]
When the onions are browned, add the balsamic vinegar and wine to deglaze the pan, being sure to scrape any brown bits off of the bottom of the pan. Add figs and simmer until tender, about 20-30 minutes, stirring occasionally and pressing the figs against the side of the pan with a wooden spoon to break them up. Add the remaining turbinado sugar and salt (to taste) and simmer for an additional 20 minutes. If jam/conserve/very thick sauce gets too thick, add more liquid (either wine or water) as needed until the desired consistency is reached.
Allow to cool until it is safe to handle, then spoon into clean jars and refrigerate. Makes approximately 1.5 liters/just over 6 cups. Should be just fine for at least 7-10 days.
* A note on wine: I used Kendall-Jackson 2010 Vintner’s Reserve Summation Red, a blend of 28% Zinfandel, 27% Merlot, 14% Cabernet Sauvignon, 7% Petite Sirah, 3% Grenache, and 2% Petit Verdot. Why? I’d like to tell you that I did because it was the perfect match for the Brix (sweetness) level of the figs, but in fact it was around, I wasn’t particularly interested in drinking it at the time, and it wasn’t so expensive that I’d feel bad about having used it for making jam/conserve/very thick sauce. Any dry red will do; I may try a Pinot Noir or some other wine for the next batch, just to see how that works. You’ve probably heard this before, but you should avoid using any wine in cooking that you wouldn’t drink. So-called “cooking wines” are about as appetizing as Drāno®.