Preheat the oven
to 375°F/190°C/gas 5. Line two cookie sheets with
parchment paper.
Beat the egg whites and salt in a
large bowl with an electric mixer at medium speed
until frothy.
With mixer at medium speed,
gradually add the superfine sugar, beating until
stiff, glossy peaks form.
Use a large
rubber spatula to fold in the confectioners' sugar
and hazelnuts. Fit a pastry bag with a 1-inch (2.5-cm)
star tip.
Fill the pastry bag, twist the opening
tightly closed, and squeeze out 1-inch (2.5cm) stars
spacing 1 inch (2.5 cm) apart onto the prepared
cookie sheets.
Bake for 8-10 minutes, or until
pale gold. Transfer to racks to cool. Stick the
cookies together in pairs with the chocolate
hazelnut cream.