Chop the chocolate and melt over a warm water bath. Whip the cream until stiff.
Quickly fold the chocolate into the cream. Chill for at least 2 hours.
Wash the thyme, shake dry, remove leaves except for something to garnish from the stems and chop. Bring sugar and 2 tablespoons of water to the boil and simmer until the sugar has melted and caramelized.
Add the almonds, sea salt and thyme leaves, except for a little to sprinkle, add sugar and roast the almonds in the sugar mixture. Pour the caramel onto a piece of baking paper and immediately spread it out as flat as possible. Remove the brittle from the paper.
Cut the mousse with a spoon in portions and arrange on plates. Chop the raspberries a little. Sprinkle mousse with raspberries, brittle and thyme. Decorate with thyme.