I made so many non-carnivore recipes in the last 13+ years, it’s “good” I have off days and a high-carber SO… I don’t use most of them though. I wasted so much time on them 
But sometimes I just change my old recipe 
Like the stews, it turned out we can use a fragment of the normal onion amount (and in the case of egg stew, sour cream replaces tomato puree) - but we probably never used much. I saw recipes, it seems many people make a stew with more vegs than meat! And Hungarian stews so usually no potatoes or other high-carb plants galore (I only know Goulash as such a stew/soup), just onion, tomato and pepper. We never used the latter two but they are commonly used.
I totally could do (relaxed) carnivore stews, I just swap the onion with some organ meat, that should work. Of course I keep all the paprika but it’s much. I saw a recipe for “Hungarian stew”, not from a Hungarian, probably, it used 8 times as much paprika as it’s good, maybe it was for very weak paprika…? We use a lot, really, but not nearly as much, it would ruin the dish.
I never made it without onions yet but the chicken liver and heart stew is very, very good, no wonder it’s a traditional dish. Soft liver, slightly chewy hearts, the latter being the bigger amount… Wonderful.
Tripe stew, on the other hand isn’t something I would want to try, no matter how very traditional and popular it is… I strongly prefer meat.
Soups are way easier, meat, possibly bones, water, salt, that’s it.
My SO doesn’t eat those, he needs vegs. It was interesting when we didn’t eat meat and I made veggie soups for both of us… Keto doesn’t allow much vegs (my keto, my definition of much) so I had to keep the amount low but high enough for him not to rebel… Dumplings are easy to make keto, they could help.
Now I would have an easier time, meat adds lots of flavor - but alas, a veggie-meat dish doesn’t suit my carnivore. So that is for off days when I am even willing to eat vegs, otherwise he eats his veggie soups and I eat my meat soups (with poached eggs, quite often).
If I ever made a huge meat soup (so I don’t want to eat it all up in 1-2 days), I could add vegs later for him I suppose… But why bother, even we don’t need soups so often anymore. It is traditional to have it every day and I had it in my first decades but it was too much unnecessary work to make some unsatiating though super palatable dish…
He can cook his own veggie soups on open fire using 2-3 hours of work… 
Just cutting the vegs takes ages.
I make my meat soups with 2 minutes of work and they are even satiating a bit…
I can complicate carnivore cooking but not in the case of most meat dishes.
Stews are good as vegs aren’t needed to cook in, we both can eat them.
If you ask something about my diet, the answer is very often eggs. And raw yolks are creamy and nutritious, make good sauces. I use them for too lean or dry meats (they can go to the purgatory with the eggs too but that’s not carnivore so not my first choice).
