The Collaborative International Dictionary of English v.0.48:

Roasting \Roast"ing\,
   a. & n., from Roast, v.
   [1913 Webster]

   Roasting ear, an ear of Indian corn at that stage of
      development when it is fit to be eaten roasted.

   Roasting jack, a machine for turning a spit on which meat
      is roasted.
      [1913 Webster]