Partially freeze meat to make slicing easier. Trim fat and gristle
from flank steak. Cut meat with grain into very thin slices.
Combine onion, thyme, bay leaves, salt, garlic, pepper, cloves, vinegar,
wine, and Worcestershire and soy sauces.
Pour marinade over steak
strips to cover and marinate in the refrigerate for about 15 hours.
Squeeze marinade from meat by rolling strips with a rolling pin.
Place meat on baking sheets or an oven rack and dry at 175 degrees
F for about 9 hours, turning once. If using a rack, place foil under
it to catch the drippings.