1.Place vegetables on baking paper-lined baking tray; brush with combined oil, thyme and garlic. Bake, uncovered, in moderately hot oven about 45 minutes or until tender. Turn vegetables, except tomato, occasionally.
2.To make the bean dip: Mash beans in medium bowl; stir in tahini, yogurt, chives and juice.
3.Serve with bean dip and lemon wedges, if desired.