It would be impossible to leave Florence without gaining much weight. Cheap Chinese meal or kebab's would save you from starvation and surrendering to the creative kitchen of Tuscan people and their famous salt-less bread that taste amazing with Provola cheese. When you're planning to go for lighter lunches, looking for oriental style dishes but you're on a budget, you can try I1 Ristoro del Perditempo, I Frattellini, or even the Darvish Café.
As much as the good food, Florence is also known for its terrific wines, you can explore Florence and the distinguished Chianti countryside and fall in love with the famous farms and friendly little villages. It would be very comforting to enjoy an informal wine tasting, and savoring delicious gourmet Tuscan lunch at one of the vineyards.
Your visit to Florence would never be complete without having the opportunity to eat in one of the many little chaotic restaurants wherein you would have to share a table. This kind of restaurants are such a hint for those backpackers, and this is also a good way for tourist to meet new people and knowing the culture and Florence more than expected, from those who can give you the full hand knowledge of it.