1. Prepare the Crust

1. Preheat oven to 325°F (163°C). Grease a 9-inch springform pan.
2. Mix crushed graham crackers, sugar, and melted butter in a bowl until combined.
3. Press firmly into the bottom of the pan and bake for 10 minutes. Let cool.

2. Make the Cheesecake Filling

1. In a large bowl, beat cream cheese and sugar until smooth.
2. Add eggs one at a time, mixing well after each addition.
3. Stir in vanilla, sour cream, and cornstarch until incorporated.
4. Blend in blueberry puree and a few drops of blue food coloring until you achieve a deep Ravenclaw blue.

3. Bake the Cheesecake

1. Pour the filling over the crust and smooth the top.
2. Place the springform pan in a larger roasting pan and add hot water halfway up the sides (for a water bath).
3. Bake for 50-60 minutes or until the center is just slightly jiggly.
4. Turn off the oven and let the cheesecake cool inside for 1 hour.
5. Remove and refrigerate for at least 4 hours or overnight.

4. Prepare the Lemon Glaze

1. In a small bowl, whisk powdered sugar, lemon juice, and zest until smooth.
2. Drizzle over the chilled cheesecake.

5. Decorate & Serve

1. Garnish with fresh blueberries, white chocolate shavings, or edible silver dust.
2. Add Ravenclaw-themed elements for a magical finishing touch.
3. Slice and serve chilled. Enjoy your Hogwarts-worthy dessert!