Place the breadcrumbs, apricots, parsley, pistachios, half the butter, salt and pepper into a bowl and mix well.
Place each of the trout on a large sheet of buttered foil on a baking tray. Spoon half the mixture into each of cavities. Brush the trout with the rest of the melted butter and enclose the foil around each of the fish to form two parcels. Place the tray into the oven for 25-30 minutes. Remove from the foil and serve.