Reserve 1 tablespoon each of the strawberries and walnuts for the garnish. In a small bowl, mix the strawberries, brown sugar and liqueur. Set aside. Blend the cream cheese and sour cream until smooth. Add the strawberry mixture, blending well. Fold in the walnuts. Mound the reserved strawberries in the center and ring with the reserved walnuts. Cover and chill.
Makes about 3.5 cups of dip.
SUGGESTED DIPPERS: chocolate Wafers or Crackers, Graham Crackers, chocolate Chunks, Ladyfingers, Bananas