Brush the cake plate with a little oil and place a cake ring or the rim of a springform pan (26 cm Ø) on top. Melt butter at low heat. Fill the sponge cakes into a freezer bag, close the bag and crumble the sponge cakes finely with a dough roller.
Mix with the liquid butter. Pour into the cake ring and press into the cake base. Chill for about 45 minutes.
Soak gelatine in cold water. Mix cream cheese, sugar, lime zest and juice. Stir in buttermilk bit by bit. Squeeze out the gelatine, dissolve at low heat and stir in 6 tablespoons of buttermilk cream by the spoonful.
Then stir into the rest of the cream. Chill for about 25 minutes until it begins to gel.
Wash and clean the strawberries, cut into thin slices and spread on kitchen paper. As soon as the cream starts to gel, stir. Barely 1⁄3 Spread the cream on the cake base. 1⁄3 Put the strawberries on top.
Cut the rest of the cream in half, spread one half on the strawberries and put 1⁄3 strawberries on top. Spread with the rest of the cream. Cover with the remaining strawberries. Chill overnight.