Food is reasonably priced, local and unsophisticated, although you will find more sophisticated restaurants for special occasions dotted throughout the region. There is usually no problem getting a table at a local restaurant as levels of tourism are low.
In particular there is a charming family-run restaurant in a small village called Bassoues; about a 30-minute drive from Mirande. Well worth a visit if you are looking for an unpretentious evening with locals.