12 oz. can frozen limeade, thawed
12 oz. can frozen lemonade, thawed
1 c. powdered sugar
4 egg whites
1 qt. club soda
6 c. crushed ice
Line slices

In 4 quart non-metal container, combine following: lemonade, limeade, powdered sugar, egg whites and crushed ice. Mix well. Cover and freeze, stirring occasionally. Remove from freezer 30 minutes before serving. Spoon 2 cups of slush mixture into blender, add 1 cup club soda. Blend until frothy. To serve, rub rim of glass with lime slice, dip rim into salt and fill glass. Garnish with lime slices.