1packetMrs. Wages salsa mixmedium -- this can be found in the canning section in most stores. I found mine at Fred Meyer but I have also seen it at WalMart
*First, to easily peel the tomatoes: add the tomatoes (whole) to boiling water for a minute or two and then place them in an ice-water bath. The peels should come off easily. Dice and pulse in a blender a couple times until you get the consistency you like.
Add onions, peppers, garlic, cilantro, and jalapenos (and Serranos if you are going to make it spicier) to a blender with some of the juice from the tomatoes (fill the blender about half-way with liquid). If you are having trouble making all of the peppers and onions fit into your blender you may have to do it in 2 batches.
Pulse 5-6 times or until the mixture becomes coarsely pureed (if you like chunkier salsa, just pulse until you get to the consistency you like).
In a large stockpot (the good, heavy duty kind used for canning) combine diced tomatoes, pepper/onion mixture, and all remaining ingredients. Bring to a simmer and simmer over low for 3-4 hours stirring often (tomatoes burn easily so keep your eye on it-- I usually stir it about every 1/2 hour).
Pour into jars hot and process 30 minutes (see Mel's Kitchen Cafe for tips on canning and processing). Makes 8 quarts.