My grandmother canned tomatoes all day frequently. I learned to blanch the peel off and quarter them to fit in a jar if they were too large. She'd always add some salt which made the tomatoes super good. There is nothing better than home canned tomatoes. You just can't get the right flavor from store bought canned tomatoes. We'd grow the tomatoes in the garden then go gather them when she was ready. Also, she canned peaches with a bit of honey. OMG! Canned peaches were great. Canned corn, beans, green beans (Not my favorite), canned Romano green beans are great, and she also made great pickles. Regular pickles and sweet pickles. One year she made canned ketchup which was a thousand times better than store bought ketchup but she never made it again. Shortly before she died I asked her why she never made it more than once and her eyes widened in surprise. She said she was disappointed with it and didn't much like it.