Stir together the tea, Peach Nectar and bourbon in a pitcher filled with ice. Pour into iced tea glasses filled with ice and garnish with a lemon slice and mint sprig.
Combine the peaches, 2 cups water, lemon juice and sugar (if using) in a blender and blend until smooth. Strain the peach nectar through a fine-mesh strainer. Store in an airtight container in the refrigerator for up to 2 days.