Source : Webster's Revised Unabridged Dictionary (1913)

Garnish \Gar"nish\, v. t. [imp. & p. p. {Garnished}; p. pr. &
   vb. n. {Garnishing}.] [OE. garnischen, garnissen, OF. garnir
   to provide, strengthen, prepare, garnish, warn, F. garnir to
   provide, furnish, garnish, -- of German origin; cf. OHG.
   warn[=o]n to provide, equip; akin to G. wahren to watch, E.
   aware, ware, wary, and cf. also E. warn. See {Wary}, {-ish},
   and cf. {Garment}, {Garrison}.]
   1. To decorate with ornamental appendages; to set off; to
      adorn; to embellish.

            All within with flowers was garnished. --Spenser.

   2. (Cookery) To ornament, as a dish, with something laid
      about it; as, a dish garnished with parsley.

   3. To furnish; to supply.

   4. To fit with fetters. [Cant] --Johnson.

   5. (Law) To warn by garnishment; to give notice to; to
      garnishee. See {Garnishee}, v. t. --Cowell.

Source : WordNet®

garnished
     adj : having decorative or flavorful additions; sometimes used in
           combination; "a whole salmon garnished with lemon
           slices"; "parsley-garnished potatoes"