Whisk the flour, yeast, sugar and salt together in a large mixing bowl.
Add the water to the flour mixture and mix until a dough has formed, and all flour is absorbed.
Cover the dough and leave it to rise in warm spot for at least an hour.
Gentle grease the inside of a 9 x 13 baking dish, using butter.
Transfer the dough to the buttered dish and drizzle with 2 tablespoons olive oil.
Use your fingers to spread the dough out so that it evenly covers the baking dish. Use your fingers to push small holes into the top across the dough
Sprinkle the surface of the dough with sea salt, rosemary, cherry tomato halves and olives.
Let the dough rise while you heat the oven to 210 °C
Bake the dough for 15 minutes at 210 °C. Reduce the heat to 180 °C and bake for a further 20 minutes.
Let the bread cool in the pan before removing to serve.