Ingredients
Method
1.Preheat oven to 180°C (fan-forced). Wipe mushrooms with a clean cloth then put them in a shallow, ovenproof dish lined with baking paper. Scatter with garlic and marjoram or oregano, sprinkle with sea salt and drizzle with olive oil. Bake for about 15 minutes, until tender.
2.Put butter and shallots in a small saucepan, cover with a lid and cook gently for several minutes until tender. Remove pan from the heat and stir in flour, then milk and mustard.
3.Bring to the boil, stirring, and cook for 1 minute. Add salt and blend in half the cheddar. Cover pan with a lid and cool sauce for 5 minutes.
4.Preheat oven grill. Toast the bread, ensuring it gets nicely crunchy.
5.Slide mushrooms out of baking dish, still on their paper, and put a clean sheet of baking paper in dish (the paper is simply to make washing up easier). Put the pieces of toast in the dish and top each with a mushroom, stalk-side up.
6.Spoon over the cheese sauce, making sure all the toast is covered. Scatter with remaining cheddar, then the crumbs and parmesan. Grill until cheese and crumbs are bubbling and golden, then serve.