Edible Monsters?

I'm working on my next release for Silver Bulette (Desktop Link), and find myself wondering what types of fantastical monsters are edible?

licensed from Fat Goblin Games

There are pretty much two criteria for "edible" things. One, it needs to be digestible. Two, it needs to not be poisonous. These rules probably hold true in a fantasy world as well. Fetid meat becomes poisonous, so undead flesh is probably out as a delicacy. Intangible things like aerial servants probably don't hold much caloric value. Something like a gelatinous cube probably has too much acid to be a viable food source. A third criteria that I am using for this project is "socially acceptable." What's edible to a starving man is completely different than what is edible to a comfortable person.

But, there are lots of things that might be edible. Take the cockatrice. Is that edible? It's basically a chicken. That can turn things to stone. Can an expert chef prepare a dish from it? How about their eggs? Gorgons are similar, with a breath weapon instead. As long as the person preparing the meal stays away from the lungs and maybe a weird gland, could it be beef stew? What about bulette? Is there soft, yummy meat under their rock-like plating?

Then there is the myriad of plants and plant-like creatures. Tangle-kelp sushi? Shrieker salad?

And the largest question that my third criterion poses is "what about intelligent creatures?" This, by far and large, makes up the bulk of "monsters" in the game: orcs, ogres, trolls, goblins (and their kin), mushroom-men, aboleth, fairies and fey, kobolds, dragons, and so on. The minotaur poses a real question, yummy beef or intelligent cow?

Is it believable to have people refuse to eat intelligent species in a fantasy setting? Would they only be opposed to eating humanoids? Would they believe that eating a superior being gives them a bit of power, and therefore pay extra for dragon meat? Would a ruthless ruler deem a particular species food because of a particular hatred for the race?

Anyone have any thoughts?

As of now, these are the creatures that I have deemed "edible"
Catoblepas
Cockatrice eggs
Dragons
Gorgons
Shriekers
Tangle Kelp