FOR THE PESTO
Add all of the ingredients to a food processor and process until smooth and combined. About one minute. Add the ice cubes and process for 1-2 more minutes until emulsified and almost “creamy” looking.
FOR THE PASTA
Bring a large pot of boiling salted water to a boil
Cook the pasta in the boiling water for one minute less than the directions on the package instruct. You will finish cooking for the last minute in the sauce
Heat the pesto very gently in a pan that can easily hold the pasta. Add 2 ounces of the pasta water. Add the pasta and cook for the final minute adding more pasta water to adjust the consistency to your preference if necessary. Using tongs, stir the pasta in the sauce making sure it’s all coated. Distribute the pasta evenly onto four plates and sprinkle each with a little extra parmesan.