Tagliatelle With Walnuts

Name: Tagliatelle With Walnuts
Total time: 45 min
Yield: 2 servings
Ingredients: 2/3 cup walnuts roughly broken up; 2 tablespoons unsalted butter; 1/3 cup sage leaves finely shredded; 1 lemon medium; 3 tablespoons heavy cream; 10 1/2 ounces tagliatelle or tagliolini; 1 3/4 cups parmesan shaved; 1/2 cup flat leaf parsley leaves chopped; 2 tablespoons lemon juice; salt; black pepper