The tartness and sweetness of this dessert capture the essence of Nantucket's summer, reflecting the novel's underlying themes of nostalgia and new beginnings.
Preheat oven to 350°F.
Mix blueberries, sugar, lemon zest, and cornstarch in a bowl.
Pour mixture into the tart crust.
Bake for 25 minutes or until the crust is golden and filling is bubbly.
Let cool before serving.