Preheat the oven to 220°C/200°C(fan oven)/gas 7
Press holes into the dough with your finger at regular intervals about 4 or 5 cm apart.
Brush the surface liberally with olive oil allowing some to settle in the holes. Sprinkle with the course sea salt.
Strip the rosemary leaves off the by pushing down the stem in the opposite direction of leaves. This should produce small clumps of 3 or 4 leaves each. Push the rosemary leaves into the holes and sprinkle any leftover over the surface. Cover with cloth until the oven is well heated to temperature.
Uncover the baking tray and place in the middle of the oven. Bake in the oven at for 23 minutes. The top should sound hollow when tapped with a utensil.
Remove from the tray and allow to cool on a cooling rack. Sprinkle Extra Virgin Olive Oil over the Focaccia before serving.