Rigatoni with Ricotta-Sage Pesto

Name: Rigatoni with Ricotta-Sage Pesto
Cook time: 40 min
Total time: 40 min
Cuisine: European, Italian, Mediterranean
Ingredients: 6 tbsp extra-virgin olive oil; 1/2 cup chopped fresh sage; 3 cups flat-leaf parsley, rough chopped; 2 tsp grated lemon zest; 1 oz parmesan cheese, finely grated; 1/2 cup whole-milk ricotta cheese; Kosher salt; Ground black pepper; 12 oz rigatoni; 1/2 cup walnuts, toasted and coarsely chopped