Heat the vegetable oil in a large pot or Dutch oven over medium heat.
Add the diced onion and sliced carrots to the pot. Sauté until the onions are translucent, about 5 minutes.
Add the maral meat to the pot and brown on all sides, about 10 minutes.
Stir in the minced garlic, salt, and black pepper, cooking for an additional 2 minutes.
Pour in the beef broth and soy sauce, bringing the mixture to a boil. Reduce the heat to low and cover the pot.
Let the stew simmer for about 30 minutes, allowing the flavors to meld together and the meat to become tender.
Add the chopped fern fronds to the pot. Continue to cook for another 10-15 minutes or until the ferns are tender.
Taste and adjust seasoning if necessary.
Serve hot, garnished with fresh dill.