Organic spices are great if you can get them. More grocery stores are starting to carry bulk organic spices, allowing you to stock up on a quality product at a great price, or you can buy them online. Cilantro gives you a more authentic flavor, but my parsley grows much better than my cilantro. I’m also one of the people who think cilantro tastes like soap, so I usually use parsley.
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.
Katie, a 35 minute processing time is TOO long for salsa- the reason your canned tomatoes need that long is because you don’t add a cup of vinegar. Do a quick Google search to find that all the reputable salsa recipes call for 15 minute processing time (extension services, and the Ball Blue Book are two)- even for the recipes that have tomato paste added. I know you said it will make you feel better to go longer, but there are good reasons not to: energy costs and over-cooking the salsa are two good ones.
I think that garlic will work fine. You can use a water bath canner or a steam bath canner – but you need either one of those to properly seal the jars. Sorry for the incorrect link. I’ve fixed it: https://www.amazon.com/gp/product/B0000DDVMH/ref=as_li_qf_asin_il_tl?ie=UTF8&tag=melskitcaf0b-20&creative=9325&linkCode=as2&creativeASIN=B0000DDVMH&linkId=2b53645dcd7f209be06b0641dbb4edab
As you will notice when we dive a little further into these recipes, Mexican food has a stunning range of somewhat special ingredients. From Masa Harina, the essential ingredient of corn over a wide array of chilies either fresh, dried or ground to Mexican oregano and tomatillos. Some of these may at first glance seem foreign and difficult to come by, but fear not we’ll discuss the individual ingredients as we go and they’ll be easier to come by than you think.