1. Melt butter in a skillet over medium heat. Add onion; cook and stir until translucent, 5 to 10 minutes. Add ground beef; cook and stir until browned and crumbly, 5 to 10 minutes.

2. Transfer beef mixture to a slow cooker. Stir in water, cabbage, tomato purée, condensed soup, rice, bouillon, salt, and pepper. Cover and cook on High for 8 hours.

Tips

Adjust the amount of ground beef or cabbage to your liking. This can be simmered in a pot on the stove for 1 to 1 1/2 hours if desired.

You can substitute tomato sauce for tomato purée and white rice for brown rice.

https://www.allrecipes.com/recipe/244847/lazy-golumpki-stuffed-cabbage-soup/