Inspired by Middle Eastern cooking.
Makes 6 servings.
Whisk oil, cumin, pepper, salt and cinnamon in 13x9x2-inch glass baking dish. Add lamb to dish and toss to coat well with oil mixture. Let marinate at room temperature 1 hour or refrigerate 1 1/2 to 4 hours, tossing occasionally.
Prepare barbecue (medium heat) or preheat broiler. Thread lamb pieces onto skewers, dividing equally (about 5 pieces per skewer). Grill or broil lamb to desired doneness, turning occasionally, about 6 minutes for medium-rare.