Prepare the pastry frame for assembling the strawberry cake.
Place a presentation board on a plate and the pastry frame on top.
Moisten the rhodoïd strips and press them against the sides of the frame. The rhodoid strips ( 5 cm in height ) make unmolding easier and result in smooth sides.
Place the sponge cake square, the cut one inside the frame.
Pat strawberries dry with paper towel.
Cut a dozen in 2, preferably the same size, otherwise even out with a knife.
Lightly soak the sponge cake with the syrup using a brush or spray bottle.
Place the strawberry halves side by side against the walls of the frame.
Fill the piping bag with mousseline cream.
Pipe the mousseline cream over the strawberries, especially into the gaps between them.
Add a generous layer of mousseline in the center.
Spread it well, making sure to cover all the sides of the frame.
Fill with strawberry pieces and then cover with more mousseline cream. Spread it well
If you don't want the sponge cake to be visible on the sides, do not fill it to the brim. Leave a little space to press it down.
Smooth with a offset spatula.
Soak the second square of sponge cake on the side that will be against the cream.
Place it on top of the frame, gently pulling on the sides to ensure it reaches the edges. Lightly soak the top.
Cover with a very thin layer of cream to make the almond paste adhere.
Smooth it out well, removing any excess.
The cream should barely be visible beneath the almond paste, especially on the sides.
Preferably decorate at the last moment, one or two hours before serving, to prevent the almond paste and strawberries from losing their brightness.
Roll out the almond paste on a sheet of parchment paper dusted with icing sugar.
Cut a square using the frame of the fraisier cake, which you will remove once the cream has set enough (I used another one). Place it on top of the fraisier and run your hands over the entire surface to remove any air bubbles.
Trim the sides to reveal the sponge cake. Cover and refrigerate until ready to serve ( I made it on Thursday and served it on Saturday evening ).
Decorate the day of the tasting to taste. I decorated it with strawberries and a few sugar paste flowers.
Do not put the fraisier cake in the freezer, as strawberries do not withstand freezing.