Cut the cabbage into wedges, remove the tough core, then chop the cabbage into bite-size pieces. Slice or chop the onion and bell pepper into even pieces so they cook at the same pace.
Heat a large skillet, braiser, or Dutch oven over medium-high heat. Add a little avocado oil, then add the sausage. Sear it for about 2 minutes on the first side, flip, and cook another 2 to 3 minutes.
Push the sausage to the side of the pan or remove it and add the ground beef. Cook and crumble the beef until browned. Do not drain the fat unless there is an excessive amount, because that flavor helps season the cabbage.
Stir in the tomato paste and let it cook with the meat for a couple of minutes. Add the onion and bell pepper, then cook until the vegetables begin to soften and turn translucent. Stir in the minced garlic and cook just until fragrant.
Season the meat mixture with onion powder, garlic powder, chipotle seasoning, paprika, Worcestershire sauce, chicken broth, salt, and black pepper. Stir well, cover, and let the mixture simmer for a few minutes so the seasoning works into the meat and vegetables.
Add the chopped cabbage. The pan may look overfilled at first, but cabbage cooks down quickly. Cover and cook for about 15 minutes, stirring occasionally, until the cabbage wilts and starts taking on the flavor from the meat mixture.
Taste and adjust with more salt and black pepper if needed. Keep cooking until the cabbage is as tender as you like it, then serve hot by itself for a low-carb meal or spoon it over rice for a fuller plate.