Cheesy Broccoli with potatoes

4 tablespoons butter 1 cup onion , chopped 1/2 cup flour 4 cups chicken broth 4 cups milk 16 ounces frozen chopped broccoli 2 cups potatoes , peeled, diced 1[...]

4 tablespoons butter or 4 tablespoons margarine 1 cup chopped onion 1/2 cup flour 4 cups chicken broth 4 cups milk 16 ounces frozen chopped broccoli 2 cups[...]

2 tablespoons butter 2 cups peeled and diced potatoes 1/2 cup chopped onion 3 minced garlic cloves 2 tablespoons flour 1 (14 1/2 ounce) can reduced-sodium[...]