Special equipment: a pizza stone
Put a pizza stone in the oven and preheat the oven to 500 degrees F.
For the crust: Using some flour, roll out the pizza dough to a large circle about 1/4 inch thick; dock with a fork all around. Transfer to the pizza stone and cook until the crust is light golden brown and slightly rigid, 10 to 15 minutes. Remove from the oven and turn the oven off.
For the white side: While the crust is baking, fold together the cream cheese, granulated sugar, vanilla and lemon zest in a medium bowl until combined. Set aside.
For the black side: In a medium bowl, toss together the milk chocolate chips, bittersweet chocolate chips and pecans.
Leaving a rim around the crust, spread one half of the crust with the cream cheese mixture and top with the marshmallows. Sprinkle the other half with the chocolate mixture (again, leaving a rim of crust). Brush the melted butter on the rim and sprinkle just the rim with the cinnamon sugar.
Put the pizza back in the warm oven. Cook until the marshmallows and chocolate are melted, about 10 minutes. Sprinkle a tiny pinch of sea salt over the entire pizza. Slice and serve warm.