How can I give this potato soup some flavour?

[AngryFeet]

I just made a batch of this soup (8 days worth) and it is very bland (a bit like very runny mash!). How can I make it a bit more palatable as it is my lunch for the rest of the week?

Pesto?

Ooh not a bad plan....

It's all very low sodium and very little salt which often ends up being bland. I'd add a teaspoon of salt and probably a stock cube or two....