There is a listing in the LDS Site for a Joseph E. Dezert
this person was born around the same time our Joseph Dessert was born. There is a great concentration of the name Dessert and Dezert in the Meuthe-et-Moselle area (like a district or county #54). Especially around Nancy. Here is the specific listing:

Joseph Ernest Dezert
30 DEC 1822 Jarville-La-Malgrange, Meurthe-Et-Moselle, France

Use the Family Search found at www.familysearch.org - put in the name Dessert and then the country France. Take a look. I am hoping this is our line. I am going to try to find more records.

Marriage listing of Francois Dezert and Francoise Dezert
October 10, 1821
from microfilm held by LDS

Birth listing of Joseph Ernest Dezert December 30, 1822 and Marie Odille Dezert January 22, 1822 from microfilm held by LDS