Boil cabbage until soft. Save water.

Chop onions and sauté in butter until translucent.

Mix together ground beef, uncooked rice, onions, egg, and salt & pepper.

Place ground beef mixture on a cabbage leaf and roll up.

Place Halupki seam side down in crock pot and/or casserole dish. Cover with vinegar and/or tomato sauce and add some cabbage water.