1. Preheat the oven to 220°C. Grease a baking tray with nonstick spray.
2. Mix the flour, yeast and salt in a large bowl with a spoon. Add the water and stir until lumpy. Use your hands to work into a rough ball, then knead for 5–10 minutes to a smooth ball. Oil the ball, put in a bowl, cover with a plastic bag and leave to rise in a warm place until doubled in size – about 30 minutes.
3. Turn out the dough onto a lightly floured surface. Use your hands to pat or stretch it out into an oval about 1cm thick.