Cut the pieces of pepper, zucchini, and onion large enough so that they don't fall through the grill rack. Or use a grill basket, which is great for grilling small pieces of food.
Combine first 4 ingredients in a large bowl. Add garlic and next 5 ingredients; toss gently to coat.
Arrange lamb mixture in grilling basket coated with cooking spray on grill rack. Grill covered, 14 minutes, turning once, until lamb is done and vegetables are tender.
Cooking Light Superfast Suppers
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