You can find recipes online, although I usually just use equal parts ground pork and ground beef, and mix it together with white rice, salt, pepper, an egg or two, and a diced onion. Boil water, and place the cabbage leaves in the water for a bit, not until they're cooked, but pliable, so you can roll them easily, and so they'll separate from the head of cabbage easily. It helps if you cut the core out of the cabbage.

Make something resembling a mini meatloaf on top of each leaf, and then roll the leaf around it. Place into a container with the leaf edges facing down.
That's something similar to halushki, except you need some onion in there too, and no paprika.