This is a common problem with deck ovens when a lot of vegetable toppings are used. It will help to blance some of the vegetable toppings, but then they wouldn’t be quite the same as fresh. Your best bet is to reduce the amount of vegetable toppings to a more manageable level for your type of oven. This is the reason why I’ve always said that you must identify the type of pizza you want to make before actually buying an oven. When lots of vegetable toppings are the order of the day, you really need the air flow to the top of the pizza to help dry it off during baking. This means either an air impingement or Piccard oven where you can adjust the top airflow to get the best finished presentation. With your fresh tomato slices, are you storing them in perforated drain pan? Or do you store them using paper towels to layer them in your storage container? The worst thing to do is to put them into a regular container on your prep table so they just end up sitting in their own juice. What type of cheese are you using? I’ve seen fresh mozzarella let go of a lot of water when exposed to excessively high temperature. If you think this might be part of the problem, try reducing the oven temperature by 50F and extend your baking time. Also, be sure to put the veggies on top of the cheese rather than under it so you don’t trap any water under the cheese, which just aggrevates the problem.
Tom Lehmann/The Dough Doctor