- Place a pizza stone on the bottom rack of the oven and preheat to 450°F.
- Stretch and roll out your pizza dough on a floured work surface until as thin as possible without tearing. You should get about a 12-inch circle. If the pizza dough springs back, cover it with a clean kitchen towel and let it rest for 10 minutes before continuing shaping. Transfer the pizza to a parchment lined pizza peel or flat cookie sheet.
- Brush pizza dough evenly with the olive oil. Top with the goat cheese, onion, and prosciutto. Sprinkle with the rosemary and vinegar. Season to taste with salt and pepper.
- Bake the pizza for 10 minutes, or until the edges of the crust are golden.