The exact weight of tomatoes will depend on the variety you use. I like to use roma (paste tomatoes) if I have them because the water content is less but any kind of tomato will work. The key is to peel the tomatoes and let them drain. See the step-by-step tutorial below the recipe for a visual. I like to pull out and discard the thicker white core of the tomatoes.
I haven’t yet tried your salsa recipes. I have been looking for information to can some killer cherry salsa I came up with a few years ago. Have only eaten it fresh, but wanted to can it and have some last throughout the year. So I think from some of the things I have been reading is that I need to use lemon juice, (bottled for strength consistency) to make it acidic so it will not spoil. Or perhaps vinegar. I do already use lime in my salsa, but think it must need the lemon or vinegar too. Basically I just replace tomatoes with cherries and use several different chilies and make it pretty hot.
Do take a look at this post about how to choose hot peppers, when making your decision, but if you are just starting out, we would recommend starting with jalapenos. Jalapenos will give your salsa a flavor similar to a lot of store-bought brands, and they can be anywhere from mild to spicy, depending on how much veining appears on the individual pepper.
The acid ingredients used in salsa help preserve it and prevent botulism poisoning. You must add acid to canned salsas because the ingredients’ natural acidity may not be high enough. Commonly used acids in home canning are vinegar and lemon juice. Lemon juice is more acidic than vinegar, but has less effect on flavor. Use only vinegar that is at least 5% acid and use only bottled lemon juice.
Hi Holly – I’m honestly not sure in regards to food safety. From what I understand, the ingredients that can be altered without affecting food safety are: leaving out the tomato paste (not sure about the tomato sauce), altering the spices like cumin and salt and cilantro, etc., and modifying the amount of jalapenos. I don’t know the pH of radishes and how the would sub in for green peppers – and of course the amount of tomatoes and vinegar (for the main acidity) need to stay the same.
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. 
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