Preparation With machine running, drop garlic into processor and chop finely. Add walnuts and next 6 ingredients; using on/off turns, process until chunky puree forms, occasionally scraping down sides. Transfer to bowl. Mix in Parmesan cheese. Season to taste with salt and pepper. DO AHEAD: Pesto can be made 4 hours ahead. Cover and refrigerate.
Preparation With machine running, drop garlic into processor and chop finely. Add walnuts and next 6 ingredients; using on/off turns, process until chunky puree forms, occasionally scraping down sides. Transfer to bowl. Mix in Parmesan cheese. Season to taste with salt and pepper. DO AHEAD: Pesto can be made 4 hours ahead. Cover and refrigerate.