Using two kinds of chiles creates the depth in this salsa. The dried arbol chiles add a vivid pop of heat, and the jalapeños contribute a freshness that's perfect with tomatoes. The salsa comes from Barbara Mozqueda, a San Francisco cook who with her husband, Vidal, hosts big backyard parties. The salsa is excellent with Vidal's Carne Asada with Nopales and Spring Onions.
Now to the topic at hand – I’ve had the same concerns as you, especially since my dear husband is Mexican! We loved the canned salsa I made for the first week or two, then it was too vinegary, so now I use it for stuff like zucchini squash to use it up. Haven’t tried it again because, well we don’t have enough tomatoes yet and am leery about the vinegar and how to make it spicy enough. I never thought to skimp on the onions to compensate!!!
Small, very hot chiles provide a distinct taste to salsas. Jalapeño is the most popular hot chile. Other varieties include Serrano, Cayenne, Habanero, Chile Piquin, and Tabasco. Use rubber gloves when you cut or dice these chiles because they cause extreme irritation to the skin. Do not touch your face, particularly the area around your eyes, when you are working with hot chiles.
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.