It also includes concentrated lemon juice for a bit of tang. The blueberry pie filling is made of nothing but wild blueberries, a bit of sugar, water, pectin, and lemon juice for brightness.
Keep stirring constantly. Dissolve the gelatine with cold water and mix it with the blueberry filling. 2. Boil the mixture and then let it cool. Now, pour it over the top of the hardened cheesecake.