Red Flannel Hash

1 tablespoon unsalted butter 1 tablespoon vegetable oil 3 cooked beets (about 3/4 pound), peeled and cut into 1/2-inch cubes 3 cooked carrots, cut into 1/2-inch cubes 2 cooked boiling potatoes, cut into 1/2-inch cubes 1/2 c. cooked chicken, beef Read on!