Instead, you should start by cutting off the top of the tomato to create a flat side. Align your knife parallel to the flat edge, and cut slices as thick as you'd like. When it comes to diced ...

Keep the jars hot until you're ready to fill them. Add the diced tomatoes to a large pot and boil over medium-high heat, stirring occasionally, for 5 minutes. Add bottled lemon juice (or citric ...