Combine all ingredients in a large saucepan and stir frequently over high heat until mixture begins to boil, then reduce heat and simmer for 20 minutes, stirring occasionally. Ladle hot salsa into pint jars, leaving 1/2-inch headspace. Adjust lids and process in a boiling-water canner for 15 minutes at 0–1,000 feet elevation, 20 minutes at 1,001–6,000 feet, and 25 minutes above 6,000 feet.
Since many of you have asked about a weight measure for the 10 cups of tomatoes, as I’ve been canning the salsa the last few days, I’ve done a little experimenting/research. Basically, I’ve found it varies GREATLY depending on variety. When I used SIX pounds of Roma + every day garden tomatoes, after taking the skins off, lightly crushing, and draining, the yield of tomatoes to use in this recipe was about 2 1/2 cups. When I used TWO pounds of only Roma/paste tomatoes, after taking the skins off, lightly crushing, and draining, the yield of tomatoes to use was a little over one cup. I tend to err on the side of over draining the tomatoes, if anything, so that makes a difference as well. For me, because I usually use paste tomatoes in this recipe, I would plan on around 18-20 pounds (give or take) of Roma/paste tomatoes to get the 10 cups for this recipe…and even more if using tomatoes with a higher water/lower flesh content.
Two years ago I was searching for a perfect salsa recipe for canning, but I had the wrong thing in mind. Instead of thinking of this delicious Mexican salsa that I love, I was thinking of typical jarred salsa. I looked up some recipes on the internet, ones that people said were popular. I tried them out. I was very unimpressed. I should know by now that most of the time…other peoples’ recipes don’t quite work out for me. Not that there’s anything wrong with them, I just apparently have unique tastes. 🙂
Place a rack in the bottom of a large stockpot and fill halfway with water. Bring to a boil over high heat, then carefully lower the jars into the pot using a holder. Leave a 2 inch space between the jars. Pour in more boiling water if necessary until the water level is at least 1 inch above the tops of the jars. Bring the water to a full boil, cover the pot, and cook for 30 more minutes.
I like using apple cider vinegar in canning because I like the flavor, and it comes from apples. Most white vinegar comes from a variety of sources, including wood pulp. I use it white vinegar for cleaning, but it can be substituted in canning recipes if you like. The pH is the same. Lemon or lime juice can also be substituted for the vinegar in this recipe – but they give a more pronounced flavor.
Salsa Roja – our star of the show tonight! A salsa made from a variety of hot peppers, tomatoes, onions and garlic all of which have been either roasted and/or boiled prior to blending. This makes for a bright red, tasty and superbly versatile salsa that is often served as a condiment at Mexican restaurants but has a million other uses (give or take).
Tomatoes are the most important ingredient. The fresher they are the better your salsa will taste. Look for the ripest ones you can find. Getting a good char on the vegetables is another key to developing the flavor. The lime juice brightens and enhances the flavor. The recipe calls for two serrano peppers but only add one if you want to reduce the heat.