מצנן תה לימון-ג'ינג'ר

Reserve 4 lemon slices, and set aside.

Combine remaining lemon slices, water, tea bags, and gingerroot in a medium saucepan. Bring to a boil; cover, reduce heat, and simmer 5 minutes.

Remove from heat, and stir in sugar.

Let cool completely; chill at least 1 hour.

Strain tea mixture, discarding tea bags, lemon slices, and gingerroot. Stir in ginger ale.

Place ice cubes and reserved lemon slices in 4 glasses; pour tea over ice.

Serve immediately.