Add the all-purpose flour, semolina flour, and kosher salt to the bowl of a food processor and pulse to combine.
1½ cups all-purpose flour, ¼ cup semolina flour, ½ teaspoon kosher salt
Add the eggs, egg yolk, and olive oil, and pulse to combine again. The dough should form into a ball around the blade. If it doesn’t add a tablespoon of ice water and pulse again. Repeat until the dough forms into a ball.
2 large eggs, 1 egg yolk, 2 tablespoons olive oil, 2 tablespoons ice water
Transfer the dough to a clean work surface and knead for 15-20 seconds, until a smooth ball forms (the dough should be very tough).
Wrap the dough tightly in plastic wrap and allow it to rest at room temperature for 25 minutes.
Once the dough has rested, it should be soft to the touch. Divide it in half and wrap one half in plastic wrap to keep it from drying out.
Lightly dust the other half of the pasta with semolina flour and roll it according to the manufacturer's instructions on your pasta machine.