Gołąbki (cabbage roll)

Beef
Polish
Gołąbki (cabbage roll)
Cabbage1
Butter2 tbs
Onion1 chopped
Ground Beef1 lb
Ground Pork1/2 lb
Rice1 1/2 cups
Garlic1 tsp
Salt1 tsp
Black Pepper1/4 tsp
Tomato Puree3 cans