[header] How to make roasted tomato ketchup [title] Cut your tomatoes and remove the stems. [step] To start, you need to prepare your tomatoes so they can be used in the kitchen. You will have to cut them into small chunks and also remove the stems. 
[substeps] To remove the stems from either side of the tomato, simply use a fork to pry out each stem. Cut into the bottom of the tomato to create a flat surface.