As many have written, at lunchtime the menú del día often far superior to the pilgrims menú.
For specialties,
Pamplona- Chuleton, Pintxos, and Pacharán
Logroño-Pintxos in Calle Laurel
La Rioja Region- Bean Soups
Burgos- Morcilla, Cordero/Lamb, Cochinillo, Pintxos/Tapas, Alpargatas de Jamon
La...