Peel the carrots, turnip and parsnip; cut into 1-in. pieces. Place in a large bowl; add the potatoes, squash, garlic, shallots, oil, salt, thyme and pepper. Toss to coat. Transfer to a greased 15x10x1-in. baking pan., Bake, uncovered, at 400° for 45-50 minutes or until tender, stirring once.