Melt chocolate: Break chocolate into pieces and melt gently using a double boiler or microwave. Let cool slightly.
Whip egg whites: In a clean bowl, beat egg whites with salt until soft peaks form. Gradually add sugar and beat until glossy.
Whip cream: In a separate bowl, whip the cold cream and vanilla until soft peaks form.
Combine: Add egg yolks to melted chocolate, then gently fold in whipped cream and egg whites until smooth and airy.
Chill: Spoon into serving glasses and refrigerate for at least 2 hours before serving.