We recommend the Trattoria Bordino on the Via Stracciatella, 9 (close to the Ponte Vecchio, one of the streets that comes off the Piazza S. Felicita). The steak a la Fiorentina is mouth-watering and you can order it for one person (it's common that these are so big that you need to people to finish it, it's not the case here!). The rissoto al Fungi Porcini is also sensational! Order house wine. It will come out around 25€ per person.