Spread the canned tomatoes over the dough to within 2cm of the edges. Arrange the cherry tomatoes and courgettes over the top, then scatter with the mozzarella. Mix the capers, olives and garlic, then scatter over the top. Drizzle evenly with the oil. Leave to rise for 20 mins. Heat oven to 240C/ fan 220C/gas 9 or the highest setting.