1 can low-fat sweeten condensed milk
2 tsp grated lemon rind
1/3 c fresh lemon juice
8 oz carton lemon non-fat yogurt
8 oz carton Cool Whip
1 c sliced fresh strawberries
1 c fresh blueberries
1 c fresh raspberries
Cut in bite-sized pieces and set aside.
Combine condensed milk, rind, lemon juice and yogurt in a large bowl. Fold in Cool Whip.
Place half of cake pieces in bottom of a trifle bowl, top with half of lemon mixture then berries.
Repeat steps again, topping with a final layer of berries.