Spinach Pistachio Pesto Pasta

Prepare the pesto: Blend spinach, pistachios, onion or shallots, and garlic using a blender or mortar until smooth. Once blended, add salt, pepper, parmesan cheese, lemon juice, and lemon zest to the pesto mixture and blend again to combine. Cook your preferred pasta according to package directions. Drain the cooked pasta, then add the prepared pesto and mix well until the pasta is evenly coated. Add extra parmesan cheese if desired. Serve immediately while hot.