Preheat oven to 350°.
Place chopped beets in an 8x8 casserole dish, and potatoes in a 9x13 casserole dish. They need to cook separately so colors don't bleed.
To the beets, add 1 Tbs olive oil, 1 Tbs balsamic vinegar, 1 tsp dried ginger, and salt and pepper to taste. Toss to coat.
To the potatoes, add onion, 2 Tbs olive oil, 1 Tbs balsamic vinegar, 1 tsp dried ginger, chili pepper flakes, and salt and pepper. Toss to coat.
Cover dishes with foil and bake for 50-60 minutes, or until veggies are fork tender.
Add cooked beets to potatoes and toss. Serve warm or chilled.