Bill/SFNM,
That article you linked to above was interesting, particularly with regards to the
discada's former life.
The disco''s humble origin began as a field tilling disc pulled by a tractor. After being unbolted from the tilling mechanism, the three or more holes in the disc must be welded shut. Sometimes a rim is welded along the top edge and often legs of varying length are attached to the bottom. The size of discos seem to vary, with contours ranging from extremely shallow to almost conical. What makes it so different from a traditional Asian wok is the thickness of the steel. While the wok''s relatively thin metal means food cooks fast and must be stirred often to avoid scorching, the heavy gauge metal of the disco allows the center--where the real sizzling happens--to remain piping hot, with a gradual decrease in temperature as food is placed nearer to the rim. This allows food away from the center to stay warm while not getting overcooked or burned.
My mom uses a
tava to make our
roti which, as sazerac points out, is a tad less concave, but very similar in appearance. Prior to using this concave one, she actually used to use a very old one that was convex which IIRC had some marks on it that looked like holes had been patched up. Makes me wonder now about the possibility that it could've been used for something else. The convex one was very, very old which makes this story slightly more plausible (at least for my imagination), whereas the newer
tava we use was most likely made exclusively for kitchen use.
Nab