Corned Beef with onion

1 1/2 cups canned corned beef , cut up 1/3 cup minced celery 1/4 cup minced onion 1 teaspoon vegetable oil 2 tablespoons butter 2 tablespoons flour 1 1/2 cups[...]

1/4 cup butter or 1/4 cup margarine 1 cup finely minced onion 2 cups cooked peeled and sliced russet potatoes 2 cups chopped cooked fresh corned beef or 1 (12[...]