Here's my idea for "five-kingdom stew".

It's red bean chili with mushrooms and kelp, served with some sour cream on top. Then you have "all" five kingdoms in there:

* red beans are the representatives of the plants.
* mushrooms are representatives of the fungi
* kelp is the representative of the protists. If someone has an idea for a more delicious protist, let me know.
* The cream comes from animals (I don't eat meat, but I know some people do)
* The sourness of the cream is from bacteria.

I don't know of any culinary archaea. If there are any, I'd love to know.
@MegaMichelle a brief review of a search for “edible Archea” points to them being important in salt fermented foods, so add in some fish sauce.
@MegaMichelle nerd in me was compelled by your query: Good News you already got that covered according to this unless my morning brain failed me https://pmc.ncbi.nlm.nih.gov/articles/PMC4239492/
Archaea and the human gut: New beginning of an old story

Methanogenic archaea are known as human gut inhabitants since more than 30 years ago through the detection of methane in the breath and isolation of two methanogenic species belonging to the order Methanobacteriales, Methanobrevibacter smithii and ...

PubMed Central (PMC)