Fill <quantity>⅓</quantity> of a pot with water and bring it to a boil over high heat. Remove from the heat

Add <quantity>450<unit>g</unit></quantity> of dark chocolate to a large heat-proof bowl, and place it on top of the pot of hot water. Stir the chocolate until completely melted

Separate the whites from <quantity>8</quantity> eggs. Reserve the yolks in a separate bowl

Add the egg whites to the bowl of a stand mixer with the whisk attachment. Whisk on medium speed until it triples in volume

Slowly add <quantity>35<unit>g</unit></quantity> of sugar, while whisking on medium-high speed. Continue whisking until you obtain stiff peaks

Add <quantity>200<unit>g</unit></quantity> of heavy cream to a bowl. Whisk until you obtain stiff peaks

Add <quantity>20<unit>g</unit></quantity> of sugar to the bowl with the egg yolks. Whisk until you obtain a light yellow and creamy mix

Add the whipped cream to the egg yolk mixture, in <quantity>3</quantity> batches. Gently fold the mix with each addition to incorporate it completely

Add the egg yolk and cream mixture into the melted chocolate in 3 parts, gently folding to combine

Add the whipped egg whites into the chocolate mixture, in <quantity>3</quantity> batches, gently folding to combine with each addition

Scoop the mousse into <quantity>10</quantity> individual serving dishes

Cover each dish with cling film and refrigerate for at least 1h to set

The chocolate mousse is ready! Enjoy!