Mix the Dough: In a large bowl, combine sourdough starter, eggs, olive oil, and salt. Gradually add flour, mixing until a rough dough forms.
Knead: Turn onto a floured surface and knead 8–10 minutes until smooth and elastic. Cover and rest 30 minutes.
Roll and Shape: Divide dough into portions. Roll with a pasta machine or rolling pin to desired thickness. Cut into fettuccine, tagliatelle, or hand-cut noodles.
Cook: Bring a large pot of salted water to a boil. Cook pasta 2–4 minutes until tender but firm.
Serve: Toss with rustic sauces like tomato ragù, browned butter with sage, or olive oil and garlic. Top with grated cheese if desired.