Process the tomatoes through a food mill, or by manually skinning and seeding the tomatoes.
Add the crushed tomatoes to a large stockpot (or 2 stockpots) and simmer bring them to a boil.
While simmering the tomatoes, brown the onion, garlic and jalapeno together in a skillet.
Add the lemon juice, corn starch, jelly, onions, jalapenos, garlic and tomato paste to the crushed tomatoes and simmer to the desired consistency. This may take a few hours, because you need to do it over low heat so as not to burn the bottom of the pot.
When the tomato sauce has reached your desired consistency, add the remaining ingredients and simmer another 20 minutes to heat through.
Taste to see if any seasonings needs adjusting: if it needs more salt add it one teaspoon at a time and taste again; if it needs to be spicier add more hot peppers; if it needs more acid add more lemon juice; if its too spicy or too tart add more or sugar or grape jelly.
Ladle into hot jars. Process for 15-20 minutes in a boiling water canner.
Makes 10-15 quarts, depending on how much you simmer it down.
Oven Canning: Fill jars with simmering salsa, put on the rings and lids and place in the oven without jars touching each other. Bake at 250 degrees for 25 minutes.