Frozen Lemonade Squares
18 squares low fat graham crackers, finely crushed (about 1-1/4 cups crumbs)
1/3 cup margarine or butter, melted
1 qt. (4 cups) frozen vanilla yogurt, softened
1 can (6 oz.) frozen lemonade concentrate, thawed
1/2 cup thawed Lite Cool Whip
MIX graham crumbs and margarine. Press firmly onto bottom of 9-inch square pan.
BEAT yogurt and lemonade concentrate in large bowl with electric mixer on medium speed until well blended. Spread over crust.
FREEZE 4 hours or until firm. Cut into squares. Top each square with a dollop of whipped topping. Garnish with fresh mint sprigs and lemon slices, if desired. Store leftover dessert in freezer.