1. Preheat oven to 350 degrees F. Remove the beet greens, wash and quarter or cut the beets in half (depending on size).
2. Toss beets in oil and place in a baking dish. Bake for approximately 30 minutes or until beets are tender. Remove and let cool.
3. Mix beets, apples and mustard together.
Can be served cool or warm and is delicious the next day.