Method
Break the chocolate into small pieces and place in a large, heatproof bowl. Sit the bowl over a pan of gently simmering water to melt the chocolate. Remove from the heat and allow to cool slightly at room temperature.
Meanwhile whisk the egg whites in a large bowl until stiff, but not too dry.
Whisk the egg yolks, sweetener, orange zest and brandy together then spoon into the melted chocolate, mixing well.
Fold in the egg whites with a metal spoon until well combined. Divide this mixture between 4 individual ramekins or glasses and chill for around 4 hours or until set.
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