This restaurant is located in the Oltrarno area. If you cross the Ponte Vecchio and head right, it's about 2-3 blocks down, on the left.
They had excellent local dishes, including steaks, pastas and salads. The staff spoke English and seemed used to catering to American tourists. I was there at lunch so I'm not sure if reservations are needed at dinner. This is a decent, inexpensive trattoria that I would visit again.