Accio, for the Lucani, is what white celery. This vegetable has a sharp and fresh taste and it is fantastic for this thick and filling soup. Other ingredients are soprassata (a type of salami or sausage), provola cheese, hard-boiled egg and pecorino cheese.
This dish is served in a soup bowl or crock pot over a bed of roasted bread slices (rubbed with garlic if you like).