Boil the water, milk, salt, sugar and butter together. add the sifted flours. Place in bowl and add the eggs slowly until the desired consistency is obtained. Pipe on to parchment paper at 190°C / 374°f.
Mix all ingredients together and chill. roll out very thinly between 2 pieces of parchment paper. Cut out small discs to be placed on the choux pastry puffs. Roll and cut out the desired shape.
Bring the passion fruit puree to a boil, add the milk and bring to a full boil. Whisk in sugar, egg yolks and starch together. temper with the milk/fruit puree and cook as a pastry cream. Remove from heat and add the diced cold butter. Hand blend and chill. When cold, whip until a light, mousseline forms.
Heat the sugar to 118°C / 244.4°f, add to the egg whites (italian meringue). Mix icing sugar and almond powder. Add the raw egg whites and make form firm paste. Fold into the italian meringue. Bake at 150°C / 302°f for 12 mn.
Boil the passion fruit puree. add the cream and bring back to a boil. Melt the milk chocolate. Make an emulsion. leave to crystallise and pipe into the macaroon.
Fill up the choux pastry puffs with the passion fruit mousseline. Place a disc of milk chocolate on the puff. Place the macaroon on the top.