01 - In a small saucepan, combine the raspberries, peach slices, sugar, and water. Bring to a simmer over medium heat, stirring gently until the sugar dissolves and the fruit softens, about 4–5 minutes. Remove from heat and strain through a fine mesh sieve into a bowl, pressing firmly to extract as much juice as possible. Discard the solids and let the syrup cool to room temperature.
02 - Place the tea bags in a heatproof pitcher and pour the boiling water over them. Steep for 5 minutes, then remove and discard the tea bags. Allow the brewed tea to cool to room temperature.
03 - Add the freshly squeezed lemon juice, honey or agave syrup, and the prepared fruit syrup to the cooled tea. Stir thoroughly until well blended. Taste and adjust sweetness or acidity as desired.
04 - Refrigerate the combined mixture for at least 1 hour, or until thoroughly chilled.
05 - Fill serving glasses with ice cubes and pour the chilled tea lemonade over the ice. Garnish each glass with extra raspberries, peach slices, and fresh mint leaves.