Blue Plate Open-Faced Turkey Sandwich

Directions

1. In a large cast-iron or other heavy skillet, heat butter over medium heat. Add onion; cook and stir until tender, 4-5 minutes. Stir in flour, parsley and seasonings until blended; gradually whisk in broth. Bring to a boil, stirring constantly; cook and stir until slightly thickened, 1-2 minutes.
2. Add turkey, 1 slice at a time; heat through. Serve over bread.