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.
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.
Adela’s recipe is so simple that it’s perfect for those who are intimated about using dried chiles. It also perfect for all the dried chile lovers out there! She would always use chile de arbol, which is a tiny chile that really packs a spicy punch. Unlike other dried chiles, you don’t have to remove any of the seeds. Making this salsa recipe even easier! I recommend starting with 10-15 chiles and adding even more if you like things super spicy.
Preheat the broiler. Put the quartered tomatoes, sliced onion, and whole garlic cloves onto a roasting tray, spreading out evenly. Drizzle with plenty of olive oil and season well with salt and pepper and sprinkle with cilantro sprigs. Broil until everything is nicely charred, about 10 minutes (you want lots of deep rich color so don't be afraid if some of the edges get pretty black). 

Combine all ingredients except cumin, oregano, and cilantro in a large pot and bring to a boil, stirring frequently, then reduce heat and simmer for 10 minutes. Add spices and simmer for another 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.
Mexican cuisine is a vast and incredibly complex culinary area encompassing thousands of local styles and thousands of years of culinary innovation. Consequently, it’s probably easier to say what Mexican food is NOT: Mexican food is not nachos, hard shell tacos, fajitas or chili con carne. While their ingredients and components may be Mexican in origin, those are all (wonderful) Tex Mex dishes and consequently not part of this guide!
I just made this wonderful salsa a couple of days ago with roma tomatoes. I 4X the recipe and ended up with 32 pints of salsa. We liked it so very much I am thinking of doing more with the 1 1/2 bushels of regular tomatoes that I have. Do you think that the regular tomatoes would have too much liquid in them or would the draining take care of that problem? I didn’t add the paste last time so I would probably add it for sure to make it thicker.