I have a very odd collections of leftovers after a complicated cooking weekend. I have a small lamb steak. Some shortcrust pastry. Some pine nuts and some fresh mint. I want to make a pie, and I was thinking of some Middle Eastern type spices. But I need to bulk out the lamb a bit. I usually use potatoes, but not sure about it with the other ingredients. What else would go in a pie. I have a pretty extensive dry goods store. Or should I just go with the potatoes?