The longest quote I can find is this one, from the News Shopper of London. I don't know if it's complete:

DON'T BE CRUEL TO A VEGETABUEL
Sung by Leslie Sarony

There's a new society
Called the RSPCV
To protect spring greens
And the garden beans
From undue cruelty.
It's a great and noble task,
And here's what the members ask:

Don't be cruel to a vegetabuel.
Always take its part.
Don't be cruel to a vegetabuel.
Don't forget a lettuce has a heart.
If you please, don't split peas,
Just because they're tasty to the tongue;
And don't forget, when you order sprouts,
You're going to rob a cabbage of its young.