In a small bowl, combine the sugar and NH pectin. Cut the strawberries into small cubes.
Heat the 100g of diced strawberries in a saucepan over a low heat for a few minutes. Increase the heat. Add the caster sugar/pectin mixture. Cook over a medium heat for 2 minutes, stirring constantly. Remove from the heat and add the 50g of diced strawberries. Leave to cool slightly and fill a piping bag with the mixture. Set aside.
Soak the gelatine in cold water until softened. Heat the strawberry purée and sugar and remove from the heat and add the wrung-out gelatine. Leave to cool until the temperature is below 30°C. Gently fold in the whipping cream using an electric mixer.
Assembly
Fill the silikomart mini Raggio mould halfway with strawberry mousse. Poach with the strawberry insert and top with the strawberry mousse. Chill for at least an hour until the gelatine has set, then freeze overnight.
In a bowl, mix the crumbled shortbread biscuits with the melted butter. Using a pastry cutter with the same diameter as your pastry (I used a Silikomart perforated tart tin), use the back of a teaspoon to press the shortbread into the pastry to a depth of around 5mm.
Place in a cool place to allow the biscuit to harden.
The next day, remove the cakes from the moulds and apply the fuchsia velvet spray. Immediately place each entremet on a shortbread biscuit.