2 (16 ounce) bottles low-cal lemon-lime carbonated beverage
1 (6-ounce) can frozen limeade concentrate, thawed
Mint sprigs (Optional)
Pour carbonated beverage into freezer tray or shallow pan; freeze firm.
Break into chunks and crush.
Pour thawed limeade concentrate into blender container; add frozen crushed beverage 1 cup at a time, blending well after each addition. Stop blender several times and push down with a rubber spatula. Spoon into glasses. Garnish with mint
Makes 8 servings. 41 calories per serving