Steps
1. Preheat the oven to 180°C.
2. Crush the digestive biscuits into fine crumbs and mix them with melted butter.
3. Press the biscuit mixture into the bottom of a greased baking dish to form the crust.
4. In a mixing bowl, beat the cream cheese, sugar, egg, and vanilla extract until smooth and creamy.
5. Pour the cream cheese mixture over the biscuit crust.
6. Bake in the preheated oven for 25-30 minutes, or until the cheesecake is set.
7. Allow the cheesecake to cool completely before serving.