We don't eat potatoes very often but occasionally buy sweet potatoes which we leave on the bottom shelf in the kitchen until we either feel in a 'potato mood' or several weeks pass and we find them and think 'we should probably eat them before they go off'. Last night's tea fell into the latter category. I was making some sweet potato mash to go with the home-made breaded chicken breasts and had already peeled one potato when I started on this one:

I don't know how common multi-coloured sweet potatoes are but we've been eating sweet potatoes for a couple of years and this is the first time I've seen one like this.