Prepare the fern by rinsing it thoroughly in cold water. If using dried fern, soak it in water for 30 minutes before cooking.
Cut the maral meat into bite-sized cubes. Season with salt and pepper.
In a large pot or Dutch oven, heat the olive oil over medium heat. Add the maral meat and brown on all sides, about 5-7 minutes.
Add the chopped onion and minced garlic to the pot. Sauté until the onion is translucent, about 5 minutes.
Stir in the sliced carrots and diced potatoes. Cook for another 5 minutes.
Pour the beef or vegetable broth into the pot. Add the fern, thyme, and bay leaves. Bring to a boil.
Reduce the heat to low, cover, and let it simmer for about 45 minutes, stirring occasionally until the meat is tender.
Taste and adjust seasoning with additional salt and pepper if needed.
Serve hot, ladled into bowls.