Blueberry Lemon Trifle

3 cups fresh blueberries, divided
2 cans (15-3/4 ounces each) lemon pie filling
2 cups lemon yogurt
1 prepared angel food cake (8 to 10 ounces), cut into 1-inch cubes
1 carton (8 ounces) frozen whipped topping, thawed
Optional: Lemon slices and fresh mint

Set aside 1/4 cup blueberries for garnish.

In a large bowl, combine pie filling and yogurt.

In a 3-1/2-qt. serving or trifle bowl, layer a third of the cake cubes, lemon mixture and blueberries. Repeat layers twice.

Top with whipped topping.

Cover and refrigerate for at least 2 hours.

Garnish with reserved blueberries and, if desired, lemon and mint.