"Just Deserts"

Have you seen this expression written and perhaps been frustrated because it is spelled incorrectly? Well, actually it's not.

Deserts, as in "things deserved" has been used since the 13th century. Although it is now rarely used except within the context of this expression, this is the correct spelling, even though many now erroneously replace it with desserts (the sweet course after the entree) and others confuse it with desert (an arid region of land).