I grill just about every other night so I've tried to perfect how to cook certain vegetables along with the main course. I've found they cook to my liking when I put then on while the grill is heating up to get them going. It gives them a good 10 minutes for extreme heat before moving them aside for the main dish. They are basically roasted and steamed at the same time. Try adding some onion or tossing with lemon pepper before serving.