Heat a large skillet over medium-high heat. Add the sausage slices in a single layer and cook for 4 to 5 minutes, turning once, until deeply browned. Transfer to a plate and set aside.

Reduce heat to medium and add the 2 tablespoons of butter. Once melted, add the onion and cook 2 minutes, stirring occasionally. Add the cabbage, garlic, smoked paprika, salt, and pepper. Cook 8 to 10 minutes, stirring every couple of minutes, until wilted and edges are golden. If the pan gets dry, add 2 tablespoons of water or broth to steam for a minute.

Return the sausage to the skillet, stir to combine, and heat through for 1 to 2 minutes. Serve hot.