Preheat oven to 350 degrees. Line a rimmed cookie sheet with parchment paper.
Pour the brown sugar into a medium sized bowl. Start with about 1/4 cup and add more as you go.
Coat the tomatoes in the sugar on both sides. Lay the tomato slices on the cookie sheet in a single layer.
Roast the tomatoes for about 30 - 45 minutes, then turn the tomatoes over. Continue to cook for about 15 minutes more. You want the tomatoes to start to caramelize and turn an amber color.
Remove and allow to cool a bit. Peel off the parchment and top your pizza