Lightly fry the mushrooms cap-side down, in hot oil for 20 seconds.
2Arrange the mushrooms in a shallow roasting pan with stems facing upwards.
3Mix together the butter, garlic, thyme, lemon juice and seasoning. Spoon a little garlic butter on to each mushroom, then lightly press the breadcrumbs on top. Cook immediately in the oven for 10 minutes.