2 tbsp. butter
1 tbsp. cornstarch
1 tbsp. sugar
1/4 tsp. salt
1/2 c. mild vinegar (or 1/4 c. cider vinegar + 1/4 c. water)
2 c. canned beets (1 can)

Melt butter; add dry ingredients. Blend. Add vinegar and cook until thick. Add beets. Heat thoroughly.