How to Make and Freeze Tomato Sauce (The Green Blog Project)
The most inspiring thing about my recipe is the flash of brilliance I had when I realized that you don’t have to peel the tomatoes. You can put them in a food processor and puree everything, and then when you cook them the peeling disintegrates into the sauce for brighter tomato color and more flavor. This method will produce a rather rustic tomato sauce which still has the seeds. You can always use a food mill to remove seeds when you defrost the sauce if you’re making something where you want a more pure type of sauce. Read more about that below.
Put tomatoes in the sink and rinse well with cold water. Cut out stem area and discard. Cut each tomato into pieces about 1 inch square. (Don’t make the pieces too large or the tomatoes won’t puree easily.)
Using the food processor with the steel blade, puree diced tomatoes in batches and add to large heavy stock pot. The puree should be nearly all liquidized when you add it to the pot.
Turn the heat as low as you can get it and cook the mixture until it is reduced by at least one half and as thick as you want it. I usually cook my sauce at least 6-8 hours to condense it down to the thickness I want. Your house will smell delightfully tomato-like while you cook this. I like to use a rubber scraper to scrape off the caramelized tomato that sticks to the side of the pot as the level decreases and do that about once every half hour.
When sauce is condensed and thick, put into individual plastic containers and let cool on the counter for an hour or so. When sauce is cooled, snap on plastic lids and freeze. This will last for at least a year in the freezer.
When you’re using the sauce, if you want a more pure tomato sauce that doesn’t have any seeds you can put it through the food mill after it’s thawed. Freezing the sauce this way with no added seasonings at all creates endless possibilities for using it. Add garlic, oregano, basil, or any other seasonings you want when you use the sauce to create soups, stews, pasta sauces, or other dishes this winter.
Tomorrow I’ll be posting about something with the taste of pure summer that I created with a bit of my “just tomatoes” sauce.