01 -
Preheat oven to 180°C. In a large skillet over medium heat, render the sliced bacon until golden and crisp. Remove bacon, reserving rendered fat, and chop finely when cool.
02 -
Utilize the bacon fat to sauté diced onion for 2 to 3 minutes until softened. Add ground beef, breaking it apart, and brown thoroughly. Season with garlic powder, onion powder, smoked paprika, salt, and black pepper. Continue cooking until beef is fully cooked and any moisture has evaporated.
03 -
Stir in the unsweetened ketchup, yellow mustard, Worcestershire sauce, and half of the crumbled bacon. Mix well to integrate all aromatic and umami notes. Remove from heat.
04 -
Transfer beef mixture into a lightly greased baking dish, spreading into an even layer. Top with shredded cheddar and mozzarella cheeses, then scatter remaining bacon evenly atop the cheese layer.
05 -
In a separate bowl, whisk eggs with heavy cream until fully blended. Gently pour the custard mixture over the casserole, ensuring even coverage.
06 -
Place dish in preheated oven and bake for 20 to 25 minutes, or until the cheese is melted, the custard is just set, and the surface is lightly golden.
07 -
Allow to cool for several minutes. For classic burger flair, garnish with sliced pickles, diced tomatoes, or chopped lettuce as desired before serving.