All assuming you have a steel based ceramic topped tagine (http://www.petersofkensington.com.au/Product/ProductInfo.aspx?id=1630742)
4 lamb shanks
2 tins of tomatoes (i personally use the ones with basil and garlic pre added)
medium mushrooms to suit your palate
1 small onion or shallots
get pan and a little bit of oil (up to you which flavour) to medium heat and brown shanks individually by rolling em in the oil
set em aside
lightly brown onions
add tomatoes
get to a simmer
add the shanks back in making sure you roll them in the now simmering sauce to get an even coat
lid on and lowest heat you can (well i do with smallest gas burner on the oven)
turn the shanks every hour
add the mushrooms about an hour before serving (chopping them up is up to you, but remove stalk so cap can get juiced up)
Usually serve as is, but occasionally with rice or mashed potato base
Other one i tried just this week was this one
http://www.food.com/recipe/william-sonoma-...ort-ribs-448587
and that come up a treat, makes a hell of a lot of food though