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Instructions:
Preheat oven to 375°F (190°C).
In a large skillet, cook ground beef, onion, and green pepper over medium heat until meat is browned. Drain any excess fat.
In a large bowl, whisk together mayonnaise, heavy cream, eggs, garlic powder, salt, and pepper.
Add the cooked beef mixture to the bowl and mix well.
Transfer the mixture to a 9×13 inch baking dish and sprinkle the cheddar cheese and mozzarella cheese on top.
Bake for 25-30 minutes, or until the cheese is melted and the casserole is set.
Serve hot and enjoy!
Note: Feel free to add any other ingredients you like, such as mushrooms, bacon, or diced tomatoes.
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