|The strawberries would help a lot!!|
Now, you might be saying, "What about all the lemon Jell-O left behind?" But when developing cultural icons, they need to be noticeable unlike the rather bland and transparent yellow Jell-O (although I suppose you would see the carrots better).
And why carrots? I can only imagine the obvious that when a "salad" is necessary, a mother would try to sneak in something nutritious where it might not have been otherwise. Even if technically tubers rather than official, leafy green vegetables, carrots are healthy for you and always readily available (at least in my mom's and now my own family's fridge). And, of course, the surrounding green gives further hint of the possibility of vegetable.
Now that I've got that mystery solved, guess I'll get back to trying to figure out the Utah legislature.