From the central station, you already have a few options to choose from where to get your lunch from. One of those locations is the Jumbo.
Jumbo is a grocery store with a bakery section. It's not that big of a deal when you hear someone talk about grabbing lunch at a grocery store. Many different grocery stores also have a bakery section, such as the Lidl, Albert Heijn and more.
If you want something different, then you ca head towards Banketbakkerij Jan de Groot, a bakery which isn't too far away from the Station. So if you ever want something freshly baked, then you can head towards that location.