Step 1

Unroll the puff pastry and cut into 10 long strips 1 inch wide. Butter 10 cream horn molds or cannoli tubes. Moisten the strips of puff pastry with a little water and wrap them around the molds, overlapping slightly at each turn. Dip them in 2 1/2 tablespoons of sugar and place on a baking tray lined with parchment paper. Bake at 375°F for about 10 minutes, then remove from the molds and let cool.

Step 2

For the filling: Heat up the milk. Beat the egg yolks with the corn starch and 1/3 cup of sugar. Pour the hot milk over it and cook for 5-6 minutes, stirring with a whisk. Let the custard cream cool in a bowl, covered with plastic wrap so that it touches the cream. Fill a pastry bag with the cream and fill the pastry shells with it. Serve with chopped hazelnuts.