pièce montée

from The Century Dictionary.

• noun A fancy dish, such as a salad, prepared for the adornment of the table.
• noun By extension, a decorative piece for the table, made of paste, sugar, or the like, not necessarily eatable or intended to be eaten; sometimes, a cake or jelly crowned by such a structure; a set piece.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A decorative table ornament made from sugar etc.