A recipe, though not for food:

I'll take the leg from some old table
I'll take the arm from some old chair;
I'll take the stuffing from a sofa
And from a horse I'll get some hair (I'll get some hair)
And then I'll put them all together
With some staples and some glue
And I'll get more lovin'
From that Goddam dummy
Than I ever got from you!
    (Sung to Washington and Lee Swing)

and there's always:
"What are little boys made of?"

Some that are in the DT are "Bowl of Red", and "Momma's Soup SUrprise", but my bet for th least likely one is the SPanish Civil War song "Si Me Quieres Escribire":

(translation) If you want to eat your fill, good food and not too many pesos, On that bloody battlefield stands an inn where you are welcome.

At the entrance of this inn there waits a moor by name Mohammed, Who warmly greets you, "Hurry, hurry, rare and spicy food awaits you."

The first dish which they serve is hot grenades in quick succession, Followed by a burst of shrapnel, makes a meal you'll all remember."