Louis XV au Croustillant de Pralin

Name: Louis XV au Croustillant de Pralin
Ingredients: Glacage Paradis:; 26 1/2 ounces/750 g cream; 29 1/4 ounces/830 g dark chocolate; 7 ounces/200 g superfine sugar; 3 ounces/85 g cocoa powder; 3 ounces/85 g double cream; Hazelnut Dacquoise:; 4 1/3 ounces/125 g ground hazelnuts; 4 1/3 ounces/125 g confectioners' sugar; 3 1/2 ounces/100 g egg whites; 1 3/4 ounces/50 g superfine sugar, plus more for sprinkling; Praline:; 12 1/3 ounces/350 g hazelnuts; 5 1/4 ounces/150 g granulated sugar; Feuillantine Mix:; 3 1/2 ounces/100 g white chocolate; 7 ounces/200 g fine biscuits, such as Gavottes; Chocolate Mousse:; 8 1/8 ounces/230 g cream