I have no idea how Harvard got attached to these beets but my Grandma used to make them for Sunday dinner and I love them.
Unfortunately I'm the only one in my family who loves beets, so I don't make them that often.
1lb beets, boiled and skinned and cubed
1/4 cup vinegar
Pinch salt and pepper
Mix all in a Saucepan and heat until sauce is thick.