Water bath canning involves submerging the jars in boiling water for a set period of processing time. It is suitable for high acid foods. Pressure canning (not pressure cooking) involves processing the jars in a sealed pressure canner at elevated temperature and pressure. You must can all low acid foods. You can can high acid foods, but most people just water bath can them. Some folks prefer dealing with the steam over dealing with a big pot of boiling water, which is why I give both options for this recipe. It is heavy on tomatoes and also has added vinegar, which should keep the pH below 4.6.
Hi Hannah. We have used cherry tomatoes in the past. (Same ‘problem’ with an over-abundant garden harvest. 🙂 ) We just diced the cherry tomatoes like we would have the regular tomatoes. They do give more skin than a larger tomato, but we didn’t notice that that negatively impacted the texture of the salsa. Also, the cherry tomatoes have less juice to strain out, so you might find that you want to add a little extra tomato juice (try to find some without added salt or seasonings). But, it will all depend on how juicy the tomatoes are and how much liquid you like in your salsa. (We like ours thick, so it wasn’t an issue for us at all.) Enjoy!