Prep the veggies: Chop the cabbage, onion, celery, and bell pepper. Mince the garlic.
Keep the cabbage in larger chunks so it holds up to long cooking.
Slice the sausage: Cut into 1/2-inch coins. If your sausage has a casing, leave it on—it helps keep the pieces intact.
Brown the sausage: Heat oil in a large skillet over medium-high. Sear the sausage until nicely browned on both sides, 4–6 minutes.
This step adds rich flavor.
Bloom the aromatics: In the same skillet, add onion and celery. Sauté 3–4 minutes until softened. Stir in garlic, smoked paprika, thyme, and oregano for 30 seconds until fragrant.
Build the base: Add tomato paste to the skillet and cook 1 minute to caramelize.
Pour in 1 cup of the broth and scrape up browned bits. This boosts depth in the stew.
Load the crockpot: Add cabbage, bell pepper, diced tomatoes (with juices), the skillet mixture, browned sausage, remaining broth, bay leaf, and red pepper flakes to the slow cooker. Season with a pinch of salt and pepper.
Slow cook: Cover and cook on Low for 6–8 hours or on High for 3–4 hours, until the cabbage is tender and flavors have melded.
Finish and adjust: Remove bay leaf.
Taste and adjust seasoning with more salt, pepper, or paprika. If you want it thicker, let it simmer uncovered on High for 15–20 minutes.
Serve: Ladle into bowls and top with chopped parsley. Optional: Add a drizzle of olive oil or a dollop of sour cream for richness.