Cut the Kasseler slice into strips, cut the red bell pepper into strips, cut the mushrooms into strips, and cut the red onion into thin rings.
Heat a pan over medium-high heat. Sear the Kasseler strips for 3 minutes. Add the onion and mushroom strips, cooking for 6 minutes. Season with pepper and paprika powder. Add the bell pepper strips and cook for 3 minutes. Stir in the herbal cream cheese and cook for 2 minutes until melted and heated through. Taste and adjust seasoning if needed.