Beet and Apple Saute

6 medium beets, boiled or roasted until tender
3 tablespoons butter
3 shallots, minced
1 tablespoon sugar
2 tart green apples, peeled, thinly sliced
Salt and pepper
1/3 cup apple cider vinegar
½ cup toasted walnuts, coarsely chopped
1. Cook the minced shallots in the butter in a skillet for 2 minutes. Add apple, sugar, salt and pepper and vinegar. Simmer uncovered for about 10 minutes or until apples are tender.
2. Slice cooked beets ¼ inch thick and add to skillet, cooking for about 3 more minutes. Sprinkle with walnuts and serve.