Preheat your oven to 375°F (190°C) and lightly grease your baking dish

Heat a skillet over medium heat and cook chopped bacon until crispy

Remove bacon and place on paper towels, leaving a small amount of fat in the pan

Add olive oil if needed, then add chopped onion and cook until soft

Stir in minced garlic and cook for 30 seconds until fragrant

Add ground beef to the skillet and break it apart with a spatula

Cook until fully browned and no pink remains

Drain excess grease from the pan for a cleaner flavor

Add mustard, ketchup, salt, pepper, garlic powder, and onion powder

Mix thoroughly to combine all flavors evenly

Remove from heat and let the mixture cool slightly

In a separate bowl, whisk together eggs, heavy cream, and mayonnaise until smooth

Stir half of the shredded cheese into the egg mixture

Transfer the cooked beef mixture into the greased baking dish

Spread evenly to form a base layer

Sprinkle cooked bacon pieces over the beef layer

Pour the egg and cream mixture evenly over everything

Top with remaining cheddar and mozzarella cheese

Place the dish in the oven and bake for 25–30 minutes

Bake until the center is set and the top is golden and bubbly

Broil for 2–3 minutes if you want a crispy cheesy crust

Remove from oven and allow it to rest for 5–10 minutes

Slice and serve warm