Perch with beurre blanc is a refined French dish where the perch fillet is served with beurre blanc, the emblematic sauce of the Nantes region.Perch with beurre blanc is often served with seasonal vegetables or rice, to lift the simplicity of the fish while showing off the richness and lightness of the sauce. It is particularly prized for its elegance and for the subtle balance between the delicate fish and the creamy, tangy sauce.