My daughter has dried tomatoes for years in her gas oven where she has it at the lowest setting for many hours. This was my first attempt. I have an electric oven with a convection setting. This is what happened in five hours.
Yesterday I used a recipe from online where you put some olive oil on it. That did not work, just would not get crisp. The picture on top actually is what I have to do tomorrow or Sunday. A friend has a basket of Italian tomatos that I will pick up tomorrow. Most of these will go to daughter because she had a dismal tomato crop this year.