One Potato, Two Potatoes

I bought two baking potatoes in a greengrocer's today.  Support your local independent traders and all that.  "Two pounds twenty eight pence, please.". Man alive.  Call the cops, I've been robbed.   

Anyway, gulp, move on.  I prepared the topping (homemade Ragu leftover from last night) and waited in anticipation while they baked.   Imagine my disappointment (and swearing) when I cut into them.  One completely rotten inside, the other unripe and rock hard.  What can you do?  Ping some rice and retire to watch MasterChef.