Using a rolling pin roll out each group of 3 stacked dough discs into a thin sheet. The discs are separated by oil layer which will help creating laminate structure of the pastry. Roll the dough out by lightly pressing down on rolling pin, pulling gently outwards with your fingers, and not palms. Frequently flip the dough and use plenty of flour to prevent sticking. Don’t rush it! It takes patience and practice to develop a thin phyllo pastry dough.