- 1 cup key lime juice, bottled

- Zest of 1 lime

- Juice of 2 limes

- 1 box sugar free lime gelatin

- 2 cans fat-free sweetened condensed milk

- 1 tub (8 oz) fat free cool whip, thawed

- 2 reduced fat graham cracker pie crusts

Put juices and zest in a bowl and slowly whisk in gelatin until almost dissolved. Whisk in condensed milk until fully blended. Whisk in whipped topping until blended. Pour mixture into crusts and freeze for 6 hours.