Preheat oven to 200ºC fan-force. Trim the stalks from the mushrooms and finely chop. Tear the bread into coarse crumbs, Place in a large bowl and drizzle with oil. Add the chopped stalks, thyme, parsley, garlic, pine nuts, walnuts, lemon juice, zest and half the parmesan. Season with sea salt and black pepper.
Place the mushrooms on a baking tray, stalk side up. Divide the stuffing between the mushrooms and press down slightly. Bake for 20 minutes or until the stuffing is golden and the mushrooms cooked.
Sprinkle with remaining parmesan to serve.
Cook up a mushroom feast and share your mushroom creations with us for a chance to win a Weber BBQ!