In a large pan, add the chopped tomatoes, onions and salt. Cover with water and bring to a boil, until all of the tomatoes have turned color. Drain well.
To the tomato mixture, add the vinegar, sugar, bell peppers and jalapeƱo peppers.
Bring to boil over high heat. Boil for 10 minutes.
Remove from heat; ladle into sterilized jars and seal.