Preheat oven to 350F.
Bring a large pot of water to a boil. Place the whole cabbage head in the boiling water for 5-10 minutes, removing softened leaves as they loosen. Set the leaves aside to cool.
In a large bowl, combine ground meat, cooked rice & seasonings.
Place a scoop of the meat mixture into each cabbage leaf. Fold in the sides and roll them up tight. Place rolls in a 9X13 baking dish seam side down.
Pour tomato sauce and diced tomatoes over top of all the cabbage rolls, sprinkle with a bit more salt/pepper & oregano.
Cover and bake for 30 minutes. After 30 minutes, uncover and allow to cook for an additional 10-15 minutes. The cabbage should be tender and the sauce bubbling. Simple, hearty & homey! :)