moxfactor

it's actually called Pork Hock, Pig Knuckle is only the end part, like most chinese eat.  the hock is the actual "hand/foot" of the pig.
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here's another recipe.tvb now,tvbnow,bttvb# [. n/ V/ r" S3 M6 h9 f5 S
http://www.astray.com/recipes/?show=Pork%20hocks%20%20(schweinshaxe)