Process strawberries in blender or food processor until strawberries are pureed. In medium saucepan, combine pureed strawberries, tapioca, orange juice, lemon juice, cinnamon and allspice. Bring to a boil, stirring constantly with a wire whisk. Reduce heat and simmer uncovered over moderate heat until mixture is thickened. The time varies, it may take 1 hour. Stir frequently. Remove from heat. Add sugar and stir until sugar dissolves. Refrigerate mixture until well chilled. Add lemon rind and buttermilk. Mix well with wire whisk. Serve soup garnished with lime slices and sliced strawberries.