1 1/2 cups 00 flour, such as Caputo, plus more for dusting
1/4 cup semolina flour, such as Caputo, plus more for dusting
1/4 teaspoon kosher salt
1 large egg plus 8 yolks
a pasta roller
In a large bowl, combine the 00 and semolina flours and salt and form a well. Add the egg and yolks to the center of the well. Using a fork, slowly start to incorporate the flour into the eggs to form a rough dough. You may add a splash of water if the dough is too dry or a dusting of flour if it is too wet.
Lightly flour a smooth work surface and pour the dough onto the flour. Knead the dough until it springs back when you press a finger into it, 10 to 12 minutes. Flatten the dough into an even square. Wrap the dough well in plastic wrap and allow to rest for 1 hour at room temperature.
Cut the dough into 3 pieces. Set up a pasta roller according to the manufacturer's directions and set it at the widest setting. Dust one section of the dough with semolina flour and press firmly to flatten the dough to 1/4 inch. Roll the dough through the machine on the widest setting. Fold the pasta dough in thirds and dust the outside with flour. Send it through the widest setting again. Reduce the setting to the next setting. Send the dough through the machine. Fold it in thirds once again and send through the setting one more time. Continue sending the dough through the machine, reducing the setting each time, until the desired thickness is reached, about 1/8 inch. Lay the sheet out on the counter and dust with flour. Use a knife or pizza cutter to cut strips 1 inch by 10 inches. Dust the strips with more flour. Continue with the remaining dough.