Stir-fry the beets and onion in oil, and then just season them to make this easy recipe. It will keep in the fridge for 2-3 days.
Beets are a staple vegetable here in Mongolia, and are often served with meat dishes. I learned this method from a Mongolian and made a few changes.
If you get tired of this taste, it also tastes good with scrambled egg or soybeans.
Enjoy Japanese food around the world.