Stuffed mushrooms au gratin (Slideshow version)
Stage 8/15 : 20 min.
Preheat the oven to 390°F (200°C).Sit the mushroom caps on a wire rack and stand this on a baking tray lined with a sheet of cooking parchment.
Put the mushrooms in the oven for 20 minutes. This will not fully cook them, just make them release their water.