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.
4 N/ a- M# }4 W) K* {http://www.astray.com/recipes/?show=Pork%20hocks%20%20(schweinshaxe)