Hmmm. Greg Brown has one that goes

Onions, onions, O-U-N-I-O-N-S
Onions, onions, O-U-N-I-O-N-S
Eat 'em at home and buy 'em in the park
Feed 'em to your children so you'll find them in the dark,
Onions, onions, O-U-N-I-O-N-S

Quite profound, don't you think? I guess I must have head him sing it on Prairie Home Companion, in the Dept. of Folk Songs. Tune is "Ja-da" (Jada Jada Ching Ching Ching).

Source: The Prairie Home Companion Folk Song Book
-Joe Offer-