In Perugia two years ago, I remember us liking Al Mangiar Bene, Osteria Pappabona, and Osteria a Priori. My husband, more of a carnivore, liked Antica Porchetteria Granieri 1916.
Osteria La Pecora Nera in San Gemini
Terra & Arte in Narni (a deli with a tiny restaurant)
Labirinto Di Adriano in Orvieto (there are several really good restaurants in Orvieto, but this was our favorite during our 4 night stay)
In Gubbio, our two favorite restaurants are side by side: Orto Osteria dalla Terra and La Cresciamia.
The last time we were in Florence was 6 years ago, but on that trip we liked:
Osteria Antica Mescita --- Via di S. Niccolò, 60 r, San Niccolo
Ino --- Via del Georgofili 3, great panini ---we loved this place, fun and such excellent ingredients
Al Tranvai — Piazza Torquato Tasso, 14r, San Frediano
S.forno Panificio --- Via Santa Monaca, 3r
All'Antico Vinaio --- Via dei Neri, 74