The hock is the forearm so like a mini ham leg as opposed to the great big thigh bit we normally eat. It isn't very strong tasting - just tastes like ham really. You can buy them at our market cooked or uncooked for pennies (about £1.20) - I boil it for hours and hours with veggies till the meat falls off the bone - there's a bit of picking through to do but nothing worse than picking through a whole chicken. I then make vats and vats of thick lentil soup with veg and the shredded ham meat and one little hock does soup for at least 10!
depends on the size of them. the ones i get at tesco will have enough meat for 1 fat bugger (adults) and to little munchers (kids) in a single hock.
for sarnies. you will probably get between 4-6 sandwiches per hock.
for salad??? not sure if it'd make great salad.
i like to get a couple of wee ones. boil them. then roast with veggies. give everyone their own little ones (we like munching off the bone). and it goes absolutely sublimely with a hot redcurrant sauce.