Brush a cake plate with some oil. Place a cake ring or the rim of a springform pan (26 cm Ø) on top. For the cake base, melt butter at low heat. Put the cookies into a freezer bag and close the bag.
Coarsely crumble the biscuits with a dough roller. Mix the cookie crumbs and liquid butter. Fill the crumb mixture into the cake ring and press it into the cake base. Chill for about 30 minutes.
Soak 4 sheets and 1 sheet of gelatine separately in cold water. Wash and clean the strawberries. Cut 500 g strawberries into large pieces and puree with 1 teaspoon sugar. Finely dice 300 g strawberries.
For the cream, briefly mix cream cheese, 100 g sugar and vanilla flavouring. Squeeze the 4 sheets of gelatine and dissolve at low heat. Stir in 3 tablespoons of cream cheese cream and then stir into the rest of the cream.
Whip 400 g cream until stiff and fold into the cream.
Squeeze out 1 sheet of gelatine and dissolve at low heat. Stir in 100 g strawberry puree by the spoonful. 2⁄3 Spread cream cheese cream on the cake base. Spread the strawberry puree and gelatine mixture over it and pull it through loosely with a fork to create a marble pattern.
Spread with the rest of the cream and chill for about 2 hours.
Soak 5 sheets of gelatine in cold water. Then squeeze out and dissolve at low heat. First stir in 3 tablespoons of the remaining strawberry puree, then stir into the rest of the puree. Spread the strawberry cubes on the cake and pour the puree on top.
Chill for about 3 hours.
Remove the cake from the cake ring. Cut the rest of the strawberries in half. Whip 100 g cream until stiff and fill into a piping bag with a perforated spout. Decorate the cake with cream tuffs and strawberry halves.