01 - Arrange half of the angel food cake cubes in an even layer in a large trifle dish or 9x13-inch glass baking dish. Spoon half of the strawberry pie filling evenly over the cake cubes.
02 - Layer the remaining cake cubes on top of the strawberries, followed by the remaining strawberry pie filling.
03 - In a medium bowl, whisk together cold milk and vanilla pudding mix until thickened, about 2 minutes. Fold in sour cream and vanilla extract until smooth.
04 - Spread the pudding-sour cream mixture evenly over the cake and strawberry layers.
05 - Top with whipped topping, spreading it gently to cover the entire surface.
06 - Sprinkle sliced almonds and fresh strawberries on top, if using. Cover and refrigerate for at least 2 hours (or overnight) to set and allow flavors to meld. Slice and serve chilled.