Instructions

  1. In saucepan, cook leeks in 1/4 cup butter until tender.
  2. Stir in flour, salt and pepper.
  3. Gradually stir in milk.
  4. Cook, stirring constantly, until thickened.
  5. In 2-quart buttered baking dish, layer half of the potatoes, half of the leek sauce and half of the cheese.
  6. Repeat layers.
  7. Bake, covered, at 375°F for 45 minutes.
  8. Uncover.
  9. Blend bread crumbs and 1/4 cup melted butter.
  10. Sprinkle around edge of casserole.
  11. Bake 15 minutes longer.