The average biped can only take in so many renaissance masterpieces without eventually giving in to an empty stomach. So where to eat cheap in the heart of Florence? Well, here’s the thing: You’ll be tempted by quaint little trattorias offering tourist menus and a mustached host romancing you towards a table next to Laura and Bob from yesterday’s bus tour through the Chianti region. If that’s your thing, then have a seat. Some are not bad, some are not good, and most are overpriced.