Cheeseburger Casserole

• 6 Thick cut Bacon slices, chopped 
• 2 Large Yellow Onions, thinly sliced
• 1 Tbsp. Worcestershire Sauce
• 1 1/4 tsp. Kosher Salt, divided
• 1 tsp. Black Pepper, divided
• 1 1/2 Lbs. Ground  Beef Sirloin
• 1/4 Cup Ketchup
• 2 Tbsp. Yellow Mustard
• 8 (3/4 oz.) American Cheese slices
• 3 Brioche Hamburger buns, cut into 3/4 inch cubes
• 4 oz. Sharp Cheddar cheese, grated
• Shredded lettuce, diced tomatoes, pickle slice, mayonnaise

Cook Bacon in a large skillet, until bacon is browned and crisp.  Set the bacon aside, pour out about 1/2 of the rendered bacon grease and using the other half, slowly Sautee the onions, until browned and caramelized.  Stir in the Worcestershire sauce, 1/2 tsp. salt and 1/4 of pepper, mix well and set aside.

Preheat oven to 350

Heat skillet over medium hi.  Add the ground beef with 1/2 of the pepper and the remaining salt.  Once the meat is brown, add the ketchup and the mustard, stir and set aside.

Spread the beef in the bottom of a lightly greased baking dish, top with caramelized onions and bacon.  Arrange the cheese slices over the bacon.

Top with the bun cubes, which could be tossed in the bacon drips before hand, placing it over the cheese slices.  Sprinkle the Cheddar cheese and the last 1/4 tsp. of black pepper.  Bake in preheated over about 20 minutes and serve with the toppings.