Preheat your oven to 350°F (175°C).
Separate cabbage leaves from the head and blanch them in boiling water for 2-3 minutes.
In a bowl, combine ground meat, cooked rice, diced onion, and spices.
Place a spoonful of filling at the base of each cabbage leaf.
Fold in the sides and roll tightly from the base to the top.
Arrange the rolls in a baking dish with seam sides down.
Pour tomato sauce over the rolls.
Cover the dish with aluminum foil.
Bake for 45 minutes, then remove foil and bake for an additional 15 minutes.
Serve hot, garnished with fresh herbs.