Corn Chowder with ribs

2 celery ribs , diced 1/4 cup onion , diced 2 tablespoons margarine or 2 tablespoons butter 2 tablespoons flour 3 cups milk 2 cups cooked ham , diced 2 cups[...]

4 ounces bacon , sliced into 1-inch pieces 2 tablespoons unsalted butter or 2 tablespoons olive oil 2 cups chopped onions 3 celery ribs , trimmed and chopped[...]