It looks like an anatomical illustration of the inside of a kidney

I'm dubious.

I'd try it, I'm adventurous like that. But I can't imagine the various components cooking evenly, and I don't want a crunchy, bland chunk of stem in what should otherwise be at least edible if not enjoyable.

I get the idea, and would actually be eager to try it if someone made it and offered. But I strongly suspect it would not only have a weird texture from the over baked exterior and undercooked stem, but it would taste bad.

Diabolical

You can make a cake out of carrots so why not broccoli? I've seen Dylan Hollis make cakes out of beans and avocado.

If this is a savory recipe I don't see anything wrong with it. If this is a sweet cake with broccoli inside, it's just trolling.