Fill a bowl with water, add 1 sliced lemon. Freeze completely, about 4 hours. In large pitcher or glass drink dispenser, add lemonade concentrate. Pour in sparkling water. Mix well. Remove bowl from freezer. Dip bowl into warm water, and turn ice out. Put ice in pitcher of lemonade mixture. Add other sliced lemon, berries and mint leaves. Pour into glasses, and add 1 oz limoncello to each.