Making Strawberry Banana Cheesecake is easy if you follow these steps:

1. Preheat the Oven: Preheat your oven to 325°F (163°C). Prepare a 9-inch springform pan by greasing the bottom and sides with butter.

2. Make the Crust: In a bowl, combine graham cracker crumbs and melted butter. Mix until the crumbs are evenly coated. Press the mixture firmly into the bottom of the prepared springform pan to form an even crust layer.

3. Bake the Crust: Place the crust in the preheated oven and bake for 10 minutes. Remove from the oven and set aside to cool.

4. Prepare the Filling: In a large mixing bowl, beat the softened cream cheese and granulated sugar together until smooth and creamy. Add the vanilla extract and mix well.

5. Add Eggs: Add the eggs one at a time, mixing gently after each addition to keep the mixture light and airy.

6. Incorporate Sour Cream: Stir in the sour cream until all ingredients are well combined. Be careful not to overmix.

7. Layer the Fruit: Pour half of the cheesecake filling over the cooled crust. Arrange half of the sliced strawberries and banana on top. Pour the remaining filling over the fruit and top with the rest of the strawberry and banana slices.

8. Bake the Cheesecake: Bake the assembly in the oven for about 1 hour, or until the center is set but slightly jiggly.

9. Cool and Chill: Once baked, turn off the oven and crack the door open slightly. Allow the cheesecake to cool in the oven for about 1 hour. Remove from the oven and let it cool to room temperature before transferring to the refrigerator.

10. Chill: Refrigerate for at least 2.5 to 3 hours, or until fully set and chilled.

11. Add Topping (optional): If desired, warm the strawberry jam slightly and drizzle over the chilled cheesecake before serving.