Heat a large skillet over medium heat and add the sausage. Cook until browned and crumbled, breaking it up with a spoon as it cooks.
Transfer the browned sausage to the slow cooker. Add the diced onion, minced garlic, shredded cabbage, beef broth, red pepper flakes, smoked paprika, salt, and black pepper.
Stir the ingredients to combine evenly. Cover the slow cooker and cook on low for 6 hours.
Stir once more before serving to distribute the flavors.
Notes
Brown the sausage thoroughly in the skillet first to build richer flavor in the finished broth. Leftovers reheat well on the stovetop and often taste even better after the spices have settled overnight. Skip extra toppings to keep the carb count low.Course: Soup
Cuisine: American
Equipment: Slow Cooker, Large Skillet