Place beets, water, salt and beer jelly in a single layer across the bottom of a small heavy pan. Cover with a lid or foil and place in the oven. Stir occasionally and allow the beets to cook for 30 minutes. Test with a fork. The beets should be slightly tender but not yet soft. Remove the cover and continue to cook for 15 more minutes until the glaze begins to thicken and coat the beets. Toss the beets in their glaze. Serves 2.