This pesto is above all the rest! This arugula walnut pesto is worth making and will leave you and your guests smiling!!! Try it soon! Arugula Walnut Pesto Ingredients 1/2 cup walnut pieces. 4 garlic cloves 2 cups packed arugula leaves. 1/2 cup freshly grated Parmesan cheese. Kosher salt and pepper to taste 1 cup