 Contemporary preparations of acquacotta may use stale , fresh , or toasted bread , and can include additional ingredients such as vegetable broth , eggs , cheeses such as Parmigiano @-@ Reggiano and Pecorino Toscano , celery , garlic , basil , beans such as cannellini beans , cabbage , kale , lemon juice , salt , pepper , potatoes and others . Some versions may use edible mushrooms such as porcini , wild herbs , and leaf vegetables / greens such as arugula , endive , mint , chard , chicory , dandelion greens , watercress , valerian and others . As the greens boil down , they contribute to the broth 's flavor . The dish may be topped with a poached egg . Contemporary versions may be prepared in advance from a few hours to a day , stored in a cold place or refrigerated , and then reheated prior to serving . It can also be preserved by freezing . 
