Spaghetti with Walnut Pesto Recipe

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The classic pesto sauce has three invariable ingredients-pine nuts, Basil and Parmesan. Today we will prepare a pesto sauce using walnuts, a little unconventional, but very tasty! In this recipe, you can use whole-grain spaghetti, then the dish will turn out to be completely dietary. This recipe is also made easier by replacing half of the Parmesan with fresh cheese, as well as adding string beans.