Start by making the bottom. Melt the margarine in a casserole.
Place the biscuits in a bowl and makes crumbles with a hand blender.
Mix the crumbles with the melted margarine.
Place a baking paper in an oven form with removable edges.
Pour all the crumbles in the form and press evenly all over the bottom.
Place the oven form in the fridge.
Start the oven at 175 degrees Celsius.
Pour the cream cheese, vanilla sugar, cornstarch and the sugar and mix well with an electrical mixer.
Add the whip cream and mix.
Add the eggs one by one while whipping with the electrical mixer.
Take out the oven form from the fridge and pour the batter in.
Pour evenly the blueberries over the cake.
Place in the middle of the oven for 40 minutes.
Take out the Cheesecake and let it cool down. Place in the fridge for minimum 4 hours.