Hot Brown Turkey Casserole

Directions

1. Preheat oven to 350°. In a large saucepan, melt butter over medium heat. Stir in flour until smooth; gradually whisk in milk. Bring to a boil, stirring constantly; cook until slightly thickened, 6-8 minutes. Remove from heat.
2. In a small bowl, lightly beat egg. Gradually whisk in 1/2 cup sauce. Slowly return all to the pan, whisking constantly. Add 1/2 cup Parmesan cheese, salt and pepper. Cook and stir until thickened. (Do not allow to boil.)
3. In a greased 13x9-in. baking dish, layer 6 toast slices and turkey; pour sauce over top. Sprinkle with paprika, bacon and remaining 1/4 cup Parmesan cheese.
4. Bake until heated through, 20-25 minutes. Top with tomatoes and parsley. Cut remaining toast slices in half diagonally; serve on the side.