Lamb ribs or even smoked lamb chops suit a variety of sides, including roasted sweet potatoes or mashed potatoes. Scalloped potatoes au gratin are also great with lamb, or consider smoked asparagus or even focaccia bread. Other ideas include roasted onions and carrots, green beans or even a simple buttered pasta side. The sky is the limit really with sides, so just make whatever you're in the mood for.