This has got to be the most disgusting thing I have ever found in my fridge, and I'm a bit embarrassed to show it to you. I think it was a dollop of mashed potato that was left over and I thought it would be good to save and use another day. Well, that day never came (as it often doesn't) and this is what I've ended up with. I have no idea how long it's been there (not as long as it looks, I don't think) but it's gone in the bin now! It makes me feel a bit ill just looking at it, so apologies if it strikes you the same way.