pick out the needles of a few rosemary sprigs and chop them very finely.grate Parmesan.pre-heat oven to 175°C fan (200°C static).butter a baking tray.mix dry ingredients, half the Parmesan and half the rosemary.in a separate large bowl, whisk eggs until frothy and doubled in volume then whisk in water and EVOO.add dry ingredients to the wet ones.stir quickly and pour onto baking tray.use a wet spatula or back of a spoon to spread and level the mixture so it is very thin and uniform (you should be able to fill an area 20cm x 35cm circa).sprinkle remaining Parmesan and rosemary all over the top and bake for about 15-18 mins until brown around the edges.let it cool slightly, then lift up from tray (slide a spatula under the focaccia if a bit stuck).cut into squares or rectangles and serve.