Prep your produce and sausage. Slice the cabbage thinly so it wilts evenly. Cut the onion and carrots, and slice the sausage into rounds.
Keep garlic minced and ready. This helps everything cook quickly and evenly.
Brown the sausage. Heat 1 tablespoon oil in a large skillet or Dutch oven over medium-high heat. Add sausage and cook 3 to 4 minutes per side until lightly browned.
Transfer to a plate and keep the rendered fat in the pan for flavor.
Soften the onions and carrots. Add remaining 1 tablespoon oil to the pan if needed. Stir in onions and carrots with a pinch of salt. Cook 4 to 5 minutes, stirring occasionally, until the onions are soft and starting to caramelize.
Add garlic and spices. Stir in garlic, smoked paprika, thyme, and red pepper flakes.
Cook 30 seconds, just until fragrant. Don’t let the garlic burn.
Wilt the cabbage. Add the sliced cabbage in batches if your pan is full. Sprinkle with salt and pepper.
Cook, tossing often, for 6 to 8 minutes until the cabbage softens and reduces in volume. If the pan gets dry, splash in a few tablespoons of broth or water.
Deglaze and brighten. Pour in the apple cider vinegar to loosen browned bits from the pan. Stir in Dijon mustard if using.
This step adds a gentle tang that balances the sweetness of the cabbage and the richness of the sausage.
Return the sausage. Add the browned sausage back to the pan. Toss everything together and cook 2 to 3 minutes to warm through. Taste and adjust salt, pepper, or vinegar to your liking.
Finish and serve. Sprinkle with chopped parsley or chives for a fresh touch.
Serve hot as is, or with warm crusty bread, cooked rice, or buttery mashed potatoes. A squeeze of lemon over each plate adds a bright final note.