Potato bud of some kind

Potato bud of some kind

Observation - Potato bud of some kind. Description: ID HELP PLEASE. This has grown from the flower on my potato plant ....???? It's about size of a cherry tomato,,,any ideas please. ???

ID HELP PLEASE. This has grown from the flower on my potato plant ....???? It's about size of a cherry tomato,,,any ideas please. ???