Desert, dessert, desert?

Stress is on the first syllable:
desert (noun) (dez' rt) A dry, often sandy region of little rainfall
Middle English, from Old French, from Late Latin desertum, from neuter past participle of deserere.

Stress is on the 2nd syllable:

desert (verb) (di-zûrt') To leave empty or alone; abandon. (noun is deserter, adjective is deserted--uninhabited, abandoned.
French déserter, from Late Latin desertare, frequentative of Latin deserere, to abandon : de- + serere, to join; see ser- in Indo-European roots.

dessert (noun) (di-zûrt')  A usually sweet course or dish, as of fruit, ice cream, etc, served at the end of a meal.
French, from Old French desservir, to clear the table : des-, de- + servir, to serve; see serve.