Source : Webster's Revised Unabridged Dictionary (1913)

Atelets sauce \A`te*lets" sauce\or Sauce aux hatelets \Sauce`
aux ha`te*lets"\ [F. h[^a]telet skewer.]
   A sauce (such as egg and bread crumbs) used for covering bits
   of meat, small birds, or fish, strung on skewers for frying.