Vanilla Bean Pizza Dough: In a small bowl, combine warm water and sugar. Sprinkle yeast over the water and let stand for 5-10 minutes, or until foamy. In a large bowl, whisk together flour and salt. Add the foamy yeast mixture, olive oil, and vanilla bean paste to the flour. Mix until a shaggy dough forms. Turn the dough out onto a lightly floured surface and knead for 5-7 minutes, or until smooth and elastic. Place the dough in a lightly oiled bowl, turning to coat. Cover with plastic wrap or a clean kitchen towel and let rise in a warm place for 1-1.5 hours, or until doubled in size. Preheat oven to 425°F (220°C). Punch down the dough and roll it out onto a lightly floured surface to form a 16-inch circle. Transfer the dough to a greased 16-inch pizza pan or baking sheet.

Cinnamon-Sugar Layer: Brush the melted butter evenly over the pizza dough. Sprinkle the brown sugar and cinnamon evenly over the buttered dough.

Cinnamon Crumb Topping: In a medium bowl, combine flour, rolled oats, brown sugar, cinnamon, and nutmeg. Cut in cold butter using a pastry blender or your fingers until the mixture resembles coarse crumbs. Stir in chocolate chips. Sprinkle the crumb topping evenly over the cinnamon-sugar layer.

Bake: Bake for 20-25 minutes, or until the crust is golden brown and the topping is set.

Vanilla Bean Glaze: While the pizza is baking, prepare the glaze. In a small bowl, whisk together powdered sugar, milk or cream, and vanilla bean paste until smooth and creamy. Add more liquid if needed to achieve desired consistency.

Assemble: Remove the pizza from the oven and let it cool slightly. Drizzle the vanilla bean glaze evenly over the warm pizza. Slice and serve immediately.