The Polish side of my family made these when I was a kid and the recipe has been lost, but I played around a little to reproduce it.
I agree with those who say to put the whole cabbage in boiling water and take off leaves as they soften. It’s just my wife and I eating these, so even if I plan to freeze a lot of leftovers, we rarely need more than about the outer half of the cabbage and the core is great for other dishes.
I cook the rice ahead of time and leave the meat raw. Raw rice takes a lot longer to cook, and came out dry when I tried it… with no benefit in flavor that I could discern. I do add an egg or two, as if I was making meat balls.
I like adding diced onion to the rice and meat mixture, but it’s not “traditional.”
For the seasonings, I keep it to salt, pepper, garlic, thyme and sage. They’re meant to be a little bland in the traditional way, but you really can’t go wrong by experimenting to your own tastes. Worcestershire sauce adds a nice touch.
For the tomato sauce, my preference is to whole whole/diced canned tomatoes that I whiz up in my blender. That way, I know I’m not dealing with added flavors. Also, the result is a sauce with a different consistency than actual tomato sauce. It’s closer to what I grew up with and so I like that. (Plus, I buy cans of diced tomatoes for soup in bulk at Costco and so I always have these on hand.)
Flavor the tomato sauce lightly with the same seasoning you used in the meat. I add a little bit of beef broth base too.
I don’t think you need to serve anything else with these to make a complete meal. When we had our family feasts, we always served a big spread buffet-style, so you had choices of all kinds of dishes. When we’ve done them for my wife and I, I often think of the meal in terms of courses rather than main/side dishes. So start with a soup. Move on to salad. Have the cabbage rolls. Finish with desert. But, it also works fine to just sit down to a big plate of the rolls and enjoy them.
Sour cream is the obvious topping of choice. The only Eastern European food that doesn’t have a sour cream garnish on top is the sour cream.
Oh, they freeze very well. So you might as well cook up 20 pounds at a time and have quick dinners ready all winter.