I left out the dried tomatoes and replaced the chicken with pepperoni. I think you could do any topping just watch in the oven as it cooks if you do just cheese, pepperoni, ham, etc so it doesn’t burn.
Our 5 yo asked for MORE after his first was devoured. Eventually the 3 yo twins are theirs too. Maybe they liked it or maybe because they would get ice cream after! 10 yo said it was delicious. I’d definitely make again. It had plenty of flavor for us. I drained the tomatoes a little bit but did leave some juice. I just seasoned til my heart was content with the garlic and oregano. Highly recommend this. The kids even loved helping!