What gift for good work should a boss give the lady worker?

What gift for good work should a boss give the lady worker?
If the boss is a man then the gift should be nothing personal. This should also be policy for every employee so that there is no feelings of favoritism. A gift such as a gift certificate for dinner for two at a nice restaurant with her boyfriend or her husband would be nice. You have to be careful that there is no reason for speculation that it is anything other than a show of appreciation for a job well done. You also do not want to convey the wrong impression to co-workers. Let them know that this may be afforded to all who display hard work. It should be a gift that shows the company's appreciation of their hard work and dedication. A plaque or a letter of commendation in their personnel record also is good. Keep it strictly business.