Season the schnitzel with salt, pepper and paprika powder. Fry in a pan in 1 tablespoon of butter on both sides for 5 minutes, remove and keep warm.
Fry the peppers, onions and the garlic in a pan with 1 tablespoon of butter, stirring constantly. Pour in the tomatoes and let everything boil down a little. Season the sauce well with salt, pepper, sugar and thyme. Put in the schnitzel and let it steep briefly.