Spaghetti with Ricotta: Spaghetti con Ricotta

Name: Spaghetti with Ricotta: Spaghetti con Ricotta
Ingredients: 1 slice pancetta, about 2 ounces; 1 onion, peeled and quartered; 1 carrot, cut into 4 pieces; 1 rib celery, cut into 4 pieces; 1 tablespoon extra virgin olive oil; 1/2 cup dry white wine; 1 teaspoon tomato paste; 1 (16-ounce) can San Marzano tomatoes and their juices; 4 fresh basil leaves; Salt and freshly ground black pepper, to taste; 1 1/2 pounds spaghetti; 1/4 pound fresh ricotta, drained; 1 clove garlic, finely chopped; 1 tablespoon finely chopped parsley