This story got my attention:
From there I landed on:
From which this:
Some years ago a reader wrote to The Chicago Reader advice column, The Straight Dope, asked whether it was true you could live on just potatoes and milk. After all, it's been said that before the Irish Potato Famine, people there were living almost solely on potatoes. Cecil Adams, the erstwhile columnist, claims to have run the numbers with his assistant and found that a whole lot of potatoes and milk would get you most of what you need – with the exception of the mineral molybdenum. But you can get all you need of that by also eating a bit of oatmeal.
Hearing this, [dietician Jennie] Jackson [of Glasgow Caledonian University] laughs. “Oh, that's our diet – that's the Scottish diet from a hundred years ago. That fits right in. Potatoes, milk, and oatmeal, with some kale in there, too.”
