Tomato melancholy can quickly give way to fits of hording. The best way to deal with a surplus of beefsteak tomatoes is to make tomato puree. These tomatoes are meant for slicing. They’re juicy, full of water and seeds. But when they’re abundant, they’re almost always over-abundant, and so one needs to do something with them. They’re too precious to let go in good conscience.
Equipment
canning pot
large stockpot, or several saucepans
fine mesh sieve or colander
every bowl in your kitchen
food mill or tomato machine
jars, lids, rings
canning tongs
ladle & funnel
fresh towels
tomatoes
salt
basil leaves
lemon juice or citric acid, optional
Bring water up to boil in your canning pot. I use a 20 quart stockpot and throw a dishtowel in the bottom so the jars aren’t sitting directly on the flame. The enamel ones with the rack are nice, too. (Keep in mind that the level of the water will rise when you put the jars in.)
Wash the tomatoes. I usually fill the sink with warm water and let them soak in there a bit to loosen up any sticky stuff or field debris that might be stuck to them. Cut out any bad spots. Do the smell test: cut the bad spot out and stick your nose in there. If it still smells fermented, cut more until it smells like fresh tomato. This test will never fail you.
Cut the tomatoes into large chunks, 4-6 pieces per tomato, nothing fancy. Put these pieces into a large pot over high heat. As the tomatoes heat up, they will release their juices. Fill the pot right up to the top and bring the whole thing to a boil. Cook until the tomatoes are good and soft, about 5-10 minutes after you add the last ones.
Now you’ve got the tomatoes separated into their two elements: solid and liquid. The goal here is to remove as much of the liquid as possible from the pulp, then to remove the good stuff from the pulp, leaving behind the seeds and skins.
Using a ladle, empty the contents of the pot into a sieve or colander to drain off the water. You can capture the water and save it if you like. It’s good to drink if you add a little salt and pepper and a twist of lemon. (I once tried to can this stuff: long story short it was a waste of time.) It’s not tomato juice as we know it and it doesn’t make a great Bloody Mary. So have a glass or two and pitch the rest.
Put the pulp into a large bowl and let it sit for 5-10 minutes while you prepare the jars. Wash them thoroughly with soap and hot water and then sterilize them by putting them in the boiling water of the canning pot for a few minutes.
Now that the pulp has settled you will notice it has released more liquid. Dump it back into the sieve one more time to get the rest of the water out.
Now we’re ready to put the pulp through the mill. I use a hand crank mill. Every one of these I have ever owned has been a real pain in the ass, but unless you have one of those nifty machines that are made especially for this purpose, there is no substitute. I’m going to get me one of those machines for next year, I swear to god I am.
Put the pulp into the mill and get to work over a very sturdy bowl or pot. Grind that stuff until it’s bone dry, pausing from time to time to scrape the precious excrescences off the bottom. Does this make it go through easier? Maybe not, but it’s nice to see that something is actually coming out. Don’t wimp out toward the end! The last few efforts will squeeze out the precious pectin found in the skins and seeds that will give your future tomato sauce nice body and texture.
Okay, whew! That was the hard part. Now let’s get it into the jars and get on with our lives. Bring the puree back up to a boil over medium heat, stirring frequently to avoid scorching it. Have your clean sterile jars and lids all ready. Ladle the hot puree into the jars, leaving ¼ inch of headspace for pints, ½ inch for quarts. (I always do puree in pints.)
It’s a good idea to get your additives into the jars before ladling the puree because it’s easy to forget. I do ¼-½ tsp salt per pint jar and one basil leaf. If you are working with tomatoes with dubious acidity, it’s good to up the acid with ½ tsp lemon juice or ¼ tsp powdered citric acid per jar. There’s nothing worse than seeing all those lids pop back up in a frothing stinky mess during the next hot spell.
Now that you’ve got all the jars full, use paper towels to wipe any spills from the rims that would prevent a good seal. It’s better to be careful and make no mess (use a good funnel). Put the lids and rings on and close tightly but not super tight: the air has to be able to seep out later to create the vacuum seal.
Put the filled jars carefully into the canning pot. They should sit in boiling water for 15 minutes to be safe. Cool on a clean towel, leaving space between the jars for air circulation. Then just listen for that sweet pop that tells you you’ve done it right. Good work. You’ll thank yourself.