Pasta with Walnut Sauce

Method

1. Place walnuts in a mortar and begin to coarsely crush them.
2. Add a clove of garlic, grated Parmesan, and salt.
3. Continue to pound until the mixture is well combined, then add olive oil little by little, emulsifying until a creamy pesto forms.
4. Meanwhile, bring a pot of salted water to a boil and cook the tagliatelle until al dente.
5. Transfer the walnut pesto to a pan (heat off). Add a ladle of pasta cooking water to loosen the sauce.
6. Drain the pasta and add it to the pesto, mixing well off the heat.
7. Serve with extra Parmesan if desired.