Not just for lamb, but any protein that needs a rich coating.  Very close to the Lamb Shawarma recipe in Jerusalem, A Cookbook. Try it on beef and pork as well.

Ingredients: Coriander, Moroccan Paprika, Black Pepper, Ginger, Cumin, White Pepper, Piment Fort, Mace, Nutmeg, Onion, Garlic, Sea Salt.