Ingredients
1/2 cup butter, divided6 tablespoons all-purpose flour1 cup whole milk1 cup heavy whipping cream3/4 cup shredded Swiss cheese1/2 teaspoon salt1/2 teaspoon pepperDash ground nutmeg8 celery ribs, cut into 1-inch pieces1/2 cup chopped celery leaves6 slices white bread, crusts removed
Preparation
Preheat oven to 375°. In a large saucepan, melt 6 tablespoons butter over medium heat. Stir in flour until smooth; gradually whisk in milk and cream. Bring to a boil, stirring constantly; cook and stir until thickened, 3-4 minutes. Stir in cheese, salt, pepper and nutmeg until combined. Stir in celery and leaves; transfer to a greased 13x9-in. baking dish.
Tear bread into pieces and place in a food processor or blender. Cover and pulse until crumbs form. Transfer to a large bowl. Melt remaining 2 tablespoons butter. Drizzle over bread crumbs; toss to coat. Sprinkle over celery mixture.
Bake until bubbly and topping is golden brown, 25-30 minutes. If desired, sprinkle with additional celery leaves.