Triglia al Cartoccio con Treviso

• 6 × 300-350 g (10-12 oz) red mullet, scaled and cleaned
• 6 small heads trevise or 24 ra

Preheat the oven to 230°C/450°F/Gas 8.

Heat the butter in a pan, and fry the garlic until light brown. Add the sliced porcini, and season with salt and pepper.

Make six rectangles of doubled foil, dull side out, and brush with oil. Place three or four trevise leaves in