Preheat oven to 350 degrees and spray a 13x9 baking dish with non-stick spray.
Add ground beef to a medium pan and cook over medium heat. Once the beef is mostly crumbled and browned, add peppers, onion, garlic, and seasoned salt. Continue cooking, stirring often, until the vegetables are soft and the beef is fully cooked.
Pour mixture into the prepared baking dish. You CAN drain the fat before you do so, but on keto and wanting the fat, I always keep it. Plus, it's delicious and adds a ton of flavor.
In a small bowl, combine eggs, heavy cream, hot sauce, and Worcestershire sauce and whisk until fully mixed.
Place cheese pieces over the beef mixture.
Pour egg mixture over the beef and cheese, ensuring maximum coverage.
Bake at 350 degrees for 30-35 minutes, until the eggs are set.
Let casserole sit on counter for five minutes before serving. Enjoy!