Lightened Up Banana Pudding

Directions

1. 1
   Whisk together the sugar, cornstarch and salt in a large saucepan; whisk in the milk until smooth.
2. 2
   Heat over medium-high heat, whisking, until bubbles begin to form.
3. 3
   Remove from the heat.
4. 4
   Whisk the egg in a medium bowl.
5. 5
   Slowly pour 1/4 cup of the hot milk mixture into the egg while whisking vigorously until smooth.
6. 6
   Pour the mixture back into the saucepan and cook over medium-high heat, whisking vigorously, until thick and starting to bubble, 1 to 2 minutes.
7. 7
   Transfer the mixture to a bowl and let cool until thick, whisking frequently.
8. 8
   Whisk in the sour cream and vanilla.
9. 9
   Cut the bananas into thin slices.
10. 10
    Layer a few banana slices, a few wafer pieces and 2 tablespoons of the prepared pudding in each of 4 glasses; repeat the layering once, and then top with a final layer of pudding.
11. 11
    Serve immediately, or cover and refrigerate up to 4 hours.