Ingredients 5 cups water 3 1/4 cups dry red wine Salt 3/4 pound spaghetti 1/4 cup extra-virgin olive oil 4 small garlic cloves, thinly sliced 1/4 teaspoon crushed red pepper 1/2 cup finely chopped parsley 1 cup walnuts (4 ounces), toasted and coarsely chopped 1/2 cup grated Parmigiano-Reggiano cheese, plus more for serving Freshly ground…