This comes awfully close.

Arctic Lime Freeze (Cooking Light)

1 (12-ounce) can thawed limeade concentrate, undiluted
1 (12.3-ounce) package reduced-fat silken firm tofu, drained
1 1/2 cups water
Mint sprigs (optional)
Grated lime rind (optional)

Combine limeade and tofu in a blender; process until smooth. Add water; pulse to combine. Pour mixture into the freezer can of an ice-cream freezer; freeze according to manufacturer's instructions. Spoon the mixture into a freezer-safe container; cover and freeze 2 hours or until firm. Garnish with mint and rind, if desired.

Yield: 5 servings (serving size: 1 cup)

Ah, cherryhairdo, that sounds like it, and CL is a mag I'd have been reading.

Cute screen id too....are you a redhead? Maureen