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In a bowl, combine graham cracker crumbs, melted butter, and sugar. Press the mixture into the bottom of a 9-inch springform pan or pie dish. Chill in the refrigerator for at least 30 minutes.
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In another bowl, beat the cream cheese, powdered sugar, and vanilla until smooth and creamy. Gently fold in the whipped cream until fully combined.
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Spread the filling evenly over the chilled crust and smooth the top. Refrigerate for at least 4 hours, or overnight for the best texture.
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For the topping, combine blueberries, sugar, and lemon juice in a small saucepan over medium heat. Cook until the berries start to release their juices. Stir in the cornstarch mixture and simmer until thickened. Cool completely before spooning over the cheesecake.