When you're planning your visit to Sumó Express-o, you could take public transportation to the station Interparking Hispania, which is the nearest station at 126 meters distance to the restaurant.
As soon as we have a menu for Sumó Express-o from Santander, we will publish it here. In the meantime, feel free to take a look at the meal plans in the surrounding area. Or help us by publishing the menu here.