You’ll need about 8 medium fresh peaches to get the 6 cups of slices in this recipe.
Place honey, chopped thyme, room-temperature water and 4 cups of the peaches in a pan. Cover and bring to a simmer over medium-high heat. Stir and reduce heat to low. Simmer, covered, stirring occasionally, for 30 minutes. Let cool completely, about 30 minutes. Pour mixture through a wire-mesh strainer, pressing solids to extract juices.
Place tea bags and remaining 2 cups peaches in a 3-quart heatproof pitcher. Add boiling water; let steep 15 minutes. Discard tea bags. Stir in lemon juice, peach syrup and bourbon, if desired. Serve over ice. Garnish with thyme sprigs and lemon slices.