Frozen Lemonade Squares

Directions

1. 1
   Mix crumbs and margarine.
2. 2
   Press firmly onto bottom of 9-inch square pan.
3. 3
   Beat yogurt and lemonade concentrate in large bowl with electric mixer on medium speed until well blended.
4. 4
   Spread over crust.
5. 5
   Freeze 4 hours or until firm.
6. 6
   Cut into squares.
7. 7
   Serve each square topped with a dollop of whipped topping, mint sprigs and lemon slices, if desired.