Italian White Bean and Pancetta Soup

In an 8-quart pot, saute pancetta in the olive oil until soft, about 10 minutes. Add onion and celery; cook and stir until the onion has softened and turned translucent, about 5 minutes. Sprinkle with sage, 1 teaspoon salt, and black pepper. Pour in the chicken stock, cover, and bring to a boil. Stir in the drained beans, cover, and reduce the heat to low. Simmer for 30 minutes.
Meanwhile, cook the pasta in 4 quarts boiling water with 1 teaspoon salt until al dente, about 10 minutes. Drain and add to the soup.
Stir in minced parsley before serving, and sprinkle with grated cheese.