Smoked and Roasted Leg of Lamb

2 cups fresh flat-leaf parsley 1 1/2 cups olive oil 1/3 cup fresh green coriander seeds 1/4 cup sherry vinegar 1 1/2 teaspoons kosher salt 2 cloves garlic, minced 1 boneless leg of lamb Serving suggestions: roasted vegetables such as fennel, eggplant and peppers, aioli and lettuces Cook's Note: If fresh green coriander seeds are not available, substitute 1 cup fresh cilantro for 1 cup of the flat-leaf parsley.