Traditional Kentucky Hot Brown Sandwich With Turkey and Bacon

Name: Traditional Kentucky Hot Brown Sandwich With Turkey and Bacon
Cuisine: American, Southern
Ingredients: 2 tablespoons butter; 1/4 cup all-purpose flour; 2 cups milk; 1/4 teaspoon salt; 1/2 teaspoon Worcestershire sauce; 1/4 cup sharp cheddar cheese (grated); 3/4 cup Parmesan cheese (grated, divided); 8 slices toast (crusts trimmed); 1 pound turkey (deli or leftover, cooked turkey, thinly sliced); 4 slices tomato (more if small); 8 strips bacon (crisply cooked and drained)