In "Psychological Subtleties", Banachek mentions a couple times that a carrot is the most likely vegetable to be named by a spectator.
On page 11 of chapter 1 ("Subtle Psychological Forces & Saves"), he describes a quickie routine called "The Carrot and the Schtick" that uses this bit of info;
--and on page 15, under "Other Forces" he mentions a number of similar things to remember: [If spectator's asked to name...]"A WILD ANIMAL FROM THE JUNGLE: Will be a lion"; "A PRETTY FLOWER: Will be a rose"; "A VEGETABLE: Will be a carrot"; "A SIMPLE SHAPE: Will be a square unless you give them time to think, then it will be a triangle"...
Also, on the dvd L&L put out a couple years ago called "The Greatest Collection of Magic Performances Ever Assembled on DVD", Michael Finney does an entertaining routine called "No/1,2,3,4".
He starts with the old "no" gag, where a guy thinks of a number between 1 & 1,000. "Is your # 847?" The guy says "no", and Michael shows he had correctly predicted & written down the gentleman's answer ("no") for a match.
He then uses a magician's choice to force the #3 on a lady; finally he asks some rapid-fire questions of the lady helping him, ultimately having her name the 1st vegetable that comes to mind. She says "carrot".
To finish, he shows those predictions ("3" and "carrot") are correct as well.
He gets much mileage and many laughs with that simple routine...