Skewers. Grill. Charcoal. We like to separate ingredients on each skewer for optimum cooking time. A typical KeBob roast will include bell peppers of all colors, onions red or white, Roma tomatoes (they stay firm), whole mushroom caps. Lamb chunks on their own skewers.
Brush the veggies with olive oil, sprinkle garlic powder and pepper, both sides. Coat the meat with Catalina French dressing. Yup. Grill in stages over hottest fire. Meat and onions take longer than peppers, mushrooms, tomatoes. All should be charred but not burnt.