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Heat oven to 220C/200C fan/gas 7. Unroll the pastry onto a large baking sheet and prick all over with a fork. Spread over the pesto, leaving a border of roughly 1 inch around the edge. Layer on the salami, top with the torn mozzarella and some seasoning, then bake for 15-20 mins until the pastry is golden, risen and crisp.
Drizzle with a little extra virgin olive oil, if you like, and scatter over some rocket.