1Preheat your oven to 180°C (350°F).
Crush the digestive biscuits into fine crumbs and mix with the melted unsalted butter.
Press the biscuit mixture into the base of a 23cm (9-inch) springform tin to form the crust. Chill in the refrigerator while preparing the filling.
In a large bowl, beat the cream cheese and granulated sugar together until smooth.
Add the eggs one at a time, beating well after each addition.
Mix in the vanilla extract.
Pour the cream cheese mixture over the chilled biscuit base.
In a blender, puree the strawberries with the 50g of sugar until smooth.
Drop spoonfuls of the strawberry puree onto the cheesecake filling and use a skewer or knife to create a swirl pattern.
Bake in the preheated oven for 45-50 minutes, or until the center is set but still slightly wobbly.
Turn off the oven and leave the cheesecake inside with the door slightly open for 1 hour.
Remove the cheesecake from the oven and let it cool completely at room temperature.
Refrigerate for at least 4 hours or overnight before serving.