01 - In a large mixing bowl, combine cranberries, blackberries, blueberries, and raspberries. If using frozen berries, allow them to thaw partially for easier mixing.
02 - Drizzle the maple syrup and orange juice over the berries.
03 - Add the orange zest and ground cinnamon.
04 - Gently toss the mixture until the berries are evenly coated.
05 - Let the blend rest for 10 minutes to allow flavors to meld.
06 - Transfer to a serving bowl and garnish with fresh mint leaves if desired. Serve chilled or at room temperature.