The blue mashed potatoes....
When we were kids and were being taught to cook, one day my mom told my brother, who was a throwback to a viking, to make mashed potatoes for supper. So he grumpily, peeled, boiled and mashed a big bowl of potatoes and then added a half bottle of blue food coloring to them and mixed well.
They turned a beautiful shade of bright blue! He hid them until we had all sat down, and then brought them out and put them on the table. Nobody said anything! My Dad stared fixedly at them for a few minutes, and then put some on his plate and added butter from our Jersey cow. The potatoes promptly turned a wierd shade of swamp green.
My father who was a kindly dutch patriarch, stood up and said: "Kids I promised you that I would eat anything you cooked no matter how burnt it is, but I just can't eat these!" I said, "But Dad, if you close your eyes they taste just like potatoes should." My dad said: "If I close my eyes I can still see them!"
I suspect the pigs got an extra treat that night....