From Muppet Wiki

Captain Vegetable is a superhero on Sesame Street who encourages kids to eat vegetables. He looks like a rabbit with a cape and always carries a carrot and a celery. His home base is a secret garden somewhere in New Jersey.

He debuted on Sesame Street in 1982, in the popular song "Captain Vegetable". His converts included Andy and Eddie. The Captain popped up a few times later on throughout Season 15.

Captain Vegetable is made of two different Anything Muppets: the Lavender (for Jim Henson's portrayal) and the Large Lavender Live Hand (for Richard Hunt's portrayal).

In Season 33, guest star John Leguizamo wore a superhero costume to play Captain Vegetable in Episode 4013.