This is super easy and perfect for the colder weather. It is also good left over warmed up. You can adjust the amount for the number of people you plan to feed.
1 beet sliced about 1/8 inch thick
2 medium parsnips sliced same thickness
1 medium sized sweet potato, peeled and sliced same thickness
1/4 large sweet onion, coarsely chopped
Heat oven to 425 degrees. Pour enough olive oil in a heavy oven appropriate pot to cover the bottom. Layer the vegetables with the chopped onion and a small amount of olive oil. Sprinkle garlic power over the top. Place lid on the pot. Bake until the vegetables are tender.
You can use any root vegetables. I used some of my favorites. I never bother to peel beets or parsnips. If you buy large parsnips, you may have to remove the core because it can sometimes be rather hard and bitter.