Coarsely chop the chocolate and couverture separately. Melt in a hot water bath
Whip the cream until stiff. Beat the eggs until frothy. Gradually stir in the liqueur and half each of the chocolate and couverture. Fold in the cream. Fill mousse into small bowls
Spread the rest of the chocolate and couverture on a board (not wood), chill. Use a spatula to plane off rolls. Decorate mousse with chocolate rolls and mint