While the pasta is cooking, make the spinach pistachio pesto. In a food processor, add the spinach, basil, pistachios, garlic, lemon juice, parmesan cheese, salt, and pepper. Turn the food processor on and slowly stream in the olive oil. Mix until pesto is smooth. Stop the machine and remove the lid. Scrape down the sides with a spatula and mix again if necessary. Taste and adjust seasonings, if necessary. If you want the pesto to be a little thinner, you can add more olive oil.