Preheat the oven to 500°F (if using a baking sheet) or as high as it will go (if using a baking stone/steel; place the stone/steel in the bottom third of the oven before you start preheating). Let the oven preheat for at least 30 minutes. Then, if you’re using a baking stone or steel, switch the oven to Broil on high.
Stretch or roll out your dough to a 12- to 14-inch circle, then transfer it to an oiled or parchment-lined baking sheet or a lightly floured pizza peel (if using a baking stone/steel).
Spoon the sauce onto the dough and spread it out evenly, leaving a ½-inch border all around. Top with the olives, carrot, zucchini, and bell pepper, then finish with the mozzarella and parmesan cheeses. Sprinkle the top with a little salt and pepper.
Transfer the pizza to the oven and bake until the crust is golden and the cheese has browned in spots—8 to 10 minutes on the baking sheet, 6 to 8 minutes on the baking stone/steel.
Remove the pizza from the oven. Drizzle it lightly with olive oil (if using); let it cool for a few minutes before slicing and serving.