My spouse and I will be traveling though Tuscany and Umbria in late November, specifically Pisa, Pienza, Siena, Arezzo, Gubbio and Assisi. We'd like to eat seasonal food and regional specialties. For example, I know that pecorino cheese is made in Pienza and that it's probably a good time of the year for mushrooms.
What would you recommend? We eat everything, but we need to stick with a modest budget. We really love street food and enjoy picnicking.