Some say this recipe is named for the great university; others, for the town of Harvard, Massachusetts. Either way, this New England favorite brings sweet and sour together, along with the deep and vivid purple that comes only from a ripe beet.
In a double boiler over medium heat, combine sugar, salt, vinegar, cornstarch, and cloves. Cook sauce until it's clear.
Slice beets into ¼-inch rounds. Add beets to sauce and cook 20 minutes; don't boil.
Remove cloves and add butter just before serving.