Bring the cream and espresso to the boil, remove from the heat. Break chocolate into pieces, chop nougat coarsely. Melt both while stirring in the cream. Chill for about 3 hours
Whip for just under 1 minute until creamy. Inject 1 tuff into each mould (medium star-shaped nozzle). Decorate with pearls. Chill for at least 2 hours. Store in a cool place