Pizza al taglio is the perfect snack, especially if it comes from this bakery behind the flower sellers in the Campo de' Fiori. Long strips of pizza bianca get topped with tomato sauce or thinly sliced potatoes, or get stuffed with mortadella or zucchini flowers. Take it all to go and eat it while leaning against a fountain in view of a palace that Michelangelo designed in the next piazza over.