Mix with your hands, making sure the flour is thoroughly moistened but not too wet. The mixture should form a shaggy ball of dough – not so dry that it falls apart and not so wet that the surface is sticky. If the dough is so dry you can’t form a ball, add the remaining water to the dough, one teaspoon at a time. Add less water than you think you need; you want to err on adding too little than too much. The remaining water should be more than sufficient; in fact, you should not need all of it.