• 2 tablespoons butter
• 2 tablespoons all-purpose flour
• 1½  cups 2% low-fat milk, heated
• 1 egg yolk
• ¼  cup plus 2 tablespoons grated Parmesan cheese, divided
• ⅛  teaspoon kosher salt
• Pinch coarse ground black pepper
• 4 slices white bread, toasted
• 8 ounces thinly sliced cooked turkey breast
• Paprika
• 4 slices bacon, cooked
• 2 small tomatoes, cut in wedges

1. Melt butter in a medium saucepan over medium-low heat. Whisk in flour. Gradually stir in milk; cook and stir over medium heat until sauce thickens and comes to a boil. Reduce heat to low. Add egg yolk, ¼ cup cheese, salt and pepper; cook 2 minutes, stirring constantly.
2. Heat broiler. Place 1 slice of toast on each of two ovenproof serving plates. Cut remaining toasts diagonally in half and arrange 2 pieces on either size of whole pieces on plates.. Cover with turkey and pour sauce over tops. Sprinkle with paprika and remaining 2 tablespoons cheese. Broil until speckled browned and bubbly. Cross 2 pieces of bacon on top of each sandwich and sprinkle with tomatoes.

Serves 2.