beat egg white,一点一点加糖,打到peak后加入塔塔粉。最后fold in chopped hazenuts
spread on a baking sheet, oven 170 15min.
turn the roll upside down on a clean baking sheet. roll it to form the 'roll' shape. wait until cool completely.
melt the chocolate in a bowl over the water. at the same time beat the cream to soft peak. gently fold in the melted chocolate (not too hot).
spread the filling in the roll and roll it up to form the shape. decorate with chocolate and hazelnuts. serve chilled.