Heat the olive oil in a large skillet. Sauté the onion for 5–7 minutes until soft. Add mushrooms, walnuts, garlic, smoked paprika, salt, pepper, and oregano. Cook for 8–10 minutes, stirring occasionally, until the mushrooms release their moisture and it evaporates. The walnuts should toast slightly.
2 tbsp olive oil, 1 medium white onion, 9 oz mushrooms, ½ cup walnuts, 4 cloves garlic, 1 tsp smoked paprika, ½ tsp salt, ¼ tsp black pepper, 1 tsp dried oregano
Stir in the vegetable broth, balsamic vinegar, soy sauce, and uncooked rice. Mix well, cover, and simmer over low heat for 10 minutes. Turn off the heat and let it sit, covered, for another 5 minutes.
½ cup vegetable broth, 2 tsp balsamic vinegar, 2 tsp soy sauce, 1 cup rice
Carefully remove 14 cabbage leaves. Blanch them in boiling water for 3–4 minutes until soft and pliable. Drain and trim the thick stems to make rolling easier.
14 leaves Savoy cabbage
Place 1–2 tablespoons of filling onto each cabbage leaf. Fold in the sides and roll up tightly like a burrito.
Preheat the oven to 390°F (200°C). Pour the marinara sauce and 1 cup of water into the bottom of a baking dish. Place the cabbage rolls seam-side down on top of the sauce. Cover with a lid or foil and bake for 20 minutes. Uncover and bake for another 20 minutes. For a lightly charred top, broil for a few minutes at the end.
2 cups marinara sauce, 1 cup water