Peach Lemonade

Peaches give traditional lemonade a sweet, soft roundness that makes it a refreshing summer drink. For adults, add white rum or bourbon.
Combine the first 3 ingredients in a medium saucepan over medium-high heat. Bring to a boil; reduce heat and simmer 3 minutes. Put the peach mixture in a blender; let stand for 20 minutes. Remove the center part of the blender lid (to release steam); secure the blender lid to the blender. Cover the hole in the blender lid with a clean towel. Whisk until smooth. Pour into a large bowl. Refrigerate for at least 3 hours.Pour the peach mixture through a sieve into a bowl, reserving the liquid; remove any dry residue. Add lemon juice. Put 1/2 cup of ice in each of the 8 glasses. Pour about 2/3 cup of lemonade into each glass; garnish each glass with 1 peach slice.