Wash 1 cup of fresh raspberries under cool running water. Slice 2 ripe peaches in half, remove the pit, and cut into thin wedges.

In a blender, combine raspberries and peach slices. Blend on high speed for about 30 seconds until smooth.

In a large pitcher, pour the fruit puree and add 1 cup of freshly squeezed lemon juice. Gradually stir in 3/4 cup of sugar or honey until dissolved.

Pour in 4 cups of cold water and stir vigorously for about 20 seconds until combined.

Cover the pitcher and chill in the refrigerator for at least 30 minutes. Serve over ice cubes and garnish with fresh mint leaves.