Preheat your oven to 400°F.
Peel the beets. If you do this in the sink with water running slightly, it helps keep the staining of your hands and cutting boards to a minimum. (You could also fill the sink and do it underwater.)
Cut beets into about 8 wedges each. In a large bowl, add beet wedges, minced rosemary and sliced garlic. Grind in some fresh salt and pepper and toss to coat. Place in a shallow baking dish and cover.
Bake in preheated oven for 30 minutes. Uncover and bake for another 30 minutes. Remove from oven and let stand for a few minutes before serving.