Mix the grated apple with the lime juice and vinegar in a small bowl. Place the herring fillets in a small dish, spread the mixture on top, and marinate 4 hours( if not consuming in 4 hours, refridgerate 12 hours then bring to room tempature before continuing) Remove the fillets and wipe off the marinade, reserving the marinade. place the fillets on a serving dish.
Pour the apple marinade into a blender, add the 1 cup raspberries and the lime zest and blend till smooth. Drizzle the mixture over the herring. garnish with raspberries and serve