Food Jokes, Knock-KnockLettuce August 6, 2018 / No Comments(Last Updated On: August 7, 2018)Knock knock. Who’s there? Lettuce. Lettuce who? Lettuce in and we’ll tell you. [ratings] How funny was this joke? Click on a star to rate it! Submit Rating Average rating 0 / 5. Vote count: 0 No votes so far! Be the first to rate this joke.Share this joke:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Pinterest (Opens in new window)Related Jokes