Place them in an oven sheet with baking paper tops facing up and bake in an oven preheated to 180°C (360°F) for 20 minutes until they lose significant amounts of liquid.
Take the mushrooms out and pat them dry with a paper towel. Arrange them on a dry oven sheet with baking paper with gills facing up.
Place the cheese on the mushroom and roasted almonds if using (the almonds add crunchiness). Place in an oven preheated to 180°c( 360°F) for around 10 minutes, until the cheese melts.
Notes
If you don't like Buche, you can use Gruyere instead but it is not as good.