Creating your Pumpkin Streusel Cheesecake is a simple yet rewarding process. Follow these steps for a fantastic result:

1. Preheat Oven: Preheat your oven to 325°F (163°C).
2. Make the Crust: In a bowl, combine the graham cracker crumbs, melted butter, and granulated sugar. Mix until well combined. Press this mixture firmly into the bottom of a 9-inch springform pan to form the crust.
3. Prepare the Filling: In a large mixing bowl, beat the softened cream cheese with granulated sugar until smooth and creamy. Add the pumpkin puree, eggs, vanilla extract, cinnamon, nutmeg, ginger, and salt. Mix until fully combined and smooth.
4. Pour Filling: Pour the cheesecake filling over the prepared crust in the springform pan, spreading it evenly.
5. Make the Streusel: In a separate bowl, mix the flour, brown sugar, and cinnamon. Add the softened butter and mix until crumbly. Stir in the chopped nuts if using.
6. Add Streusel Topping: Sprinkle the streusel topping evenly over the cheesecake filling.
7. Bake: Place the cheesecake in the preheated oven and bake for 50-60 minutes, or until the center is set but still slightly jiggly.
8. Cool: After baking, turn off the oven and crack the door open. Let the cheesecake cool in the oven for 1 hour to prevent cracking.
9. Chill: Remove the cheesecake from the oven and let it cool at room temperature for another hour. Then, refrigerate for at least 2–3 hours, or overnight for best results.
10. Remove from Pan: Once chilled, carefully remove the cheesecake from the springform pan.