The Collaborative International Dictionary of English v.0.48:

Timbale \Tim`bale"\, n. [F., prop., a kettledrum; -- so named
   from the form of the mold used. Cf. Timbal.] (Cookery)
   A seasoned preparation, as of chicken, lobster, cheese, or
   fish, cooked in a drum-shaped mold; also, a pastry case,
   usually small, filled with a cooked mixture.
   [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

timbale
    n 1: individual serving of minced e.g. meat or fish in a rich
         creamy sauce baked in a small pastry mold or timbale shell
    2: small pastry shell for creamy mixtures of minced foods [syn:
       timbale, timbale case]