Soup needs rescuing

[Muffinbutton]

I've made a pea and mint soup, which included buttermilk in the recipe. Unfortunately I added far too much buttermilk and now it just taste like sour cream. Is there anything I can do to rescue it?

I would add stock and potato. Can't guarantee it will work tho.
Maybe some garlic and herbs too?

I would add more peas - whizz some in a blender with some stock and then add

Thanks. I'll give more peas and potato a go tomorrow. Can't face it tonight!