Preheat oven to 350 degrees F (175 degrees C).
Beat softened cream cheese slightly. Add eggs, sugar, vanilla, and lemon zest. Beat until light and fluffy. Pour mixture into crust.
Bake at 350 degrees F (175 degrees C) until firm, about 25 minutes.
Let cheesecake cool then top with cherry or blueberry pie filling, if desired.
Refrigerate for at least 8 hours before serving.
