Garnish

DEF: to decorate food with a small amount of different food.

EX:

To put the final touch on her dish, she garnishes it with a sprig of parsley.

Merriam-Webster Online Dictionary
garnish (verb)
transitive verb
1.
a) - decorate embellish
b) to add decorative or savory touches to (food or drink)
2.
to equip with accessories - furnish
3.
- garnishee adorn
garnish (noun)
1.
- embellishment ornament
2.
something (as lemon wedges or parsley) used to garnish food or drink
3.
a) an unauthorized fee formerly extorted from a new inmate of an English jail
b) a similar payment required of a new worker