1. Cut carrots, parsnips, sweet potatoes and squash into 2 inch pieces.
2. Remove skins from onions and leave whole.
3. Place all vegetables into a glass casserole dish.
4. Mix in sliced garlic, rosemary, vegetable oil, and sprinkle with salt.
5. Bake in 450º F. oven for 35 to 45 minutes till tender.
6. Stir occasionally while baking.