Prepare the pizza
dough and set aside to rise. Preheat the oven to 425°F/220°C/gas 7.
Oil a large baking sheet. When
the rising time has elapsed, divide the dough into 16
pieces and shape into balls. Roll the dough balls out on
a lightly floured surface into rounds.
Transfer the
rounds to the prepared baking sheets, placing them well
apart. Let rise for 15 minutes.
Arrange the tomatoes
on the pizzas. Spoon some of the cheese over each one,
drizzle with the oil, and season with salt.
Bake for
10-15 minutes, or until the dough is golden. Wash and
dry the arugula and shred finely.
Place the arugula
and walnuts on top. Drizzle with the balsamic vinegar
and serve warm.