I think we've been here before in a book by Harry Harrison.
Here's my take on it, with the theme from (Quite fortuitously) M*A*S*H*


What's on this plate in front of me?
A diff'rent food I seem to see.
It slips down, oh so easily.
It's shallow fried, not greasily …

Oh Soylent Green® is 'armless
Quite literally armless
The meat is all well processed as you see.

I had some good stuff yesterday,
It really took my breath away,
Both jalapenos & flambé
The bog-roll's iced, what more's to say?

Mashed Soylent Green® is pleasant,
They flavour it with p(h)easant.
And Soylent® is the only game today …

My gourmet palate's oh so keen
I can't abide the Soya Bean
And tofu puddings are obscene
I'm sure you all know what I mean!

But Soylent Green's® fantastic
It doesn't taste of plastic
It truly is the best food on the scene,
...
You really taste the meat in Soylent Green®
...
The whole world should be fed on SOYLENT GREEN®

Cheers
Nigel