This is not one of those 'guess what it is' posts. That's clear. The mystery is where did they come from?
I went to retrieve some duck liver pâté from the fridge for breakfast and found these sitting next to it.
I have no recollection of buying them, whatsoever, nor I'm sure were they there when I put the pâté in the fridge last night! I live alone and have had no recent visitors who could have insinuated them into the fridge.
What a mystery!