Osso buco alla romana is a variation on the classic Italian dish with the addition of green peas. In our version, made with pork shanks, we add the peas towards the end of the cooking time so that they stay green and slightly crisp and contrast well with the tender pork. The gremolata is another twist on the classic recipe, as this one is made with Parmesan cheese and fennel fronds–the rest of the bulb is used in the recipe–instead of parsley.