Trim Stems From Beets Leaving 1/4 Inch Stem Attached. Place Beets In Pan With Enough Water To Cover. Boil , Cover, Reduce Heat And Simmer Until Tender About 25 Minutes. Drain And Cool. Peel And Slice In 1/4 In Slices. Arrange Beets On A Platter. Top With Onions And Sprinkle With Garlic. Sprinkle With Salt And Pepper. Mix Vinegar And Oil And Pour Over Beets. Refrigerate Until Well Chilled