Pour milk and cucumber in blender container. Blend until cucumber is finely minced. Add 1 can soup; blend. Pour out half of mixture into bowl. Blend other can of soup with remaining mixture in blender. Combine in bowl with remaining ingredients, except chives. Chill thoroughly. If desired, pour into a 13 X 9 X 2″ pan and place in freezer 30 minutes before serving, chilling