Order Bisteca alla Fiorentina (a huge n delicious T-bone steak) w fried vegatables. And a bottle of Brunello del Montalcino, first DOCG wine in Italy (there's a big Wikipedia entry for this wine).
The restaurant was reviewed by NY Times as Ristorante Casa di Dante, but the name is Trattoria del Penello. It is located a few meters from Dante Alighieri's house and it was founded in late 1400s.