Preheat your oven to 375 degrees F and grease a medium casserole dish.
(Recommended) Sauté the sliced bell pepper and onion in a skillet for a few minutes until softened.
In a large mixing bowl, combine the cooked beef, bell pepper, onion, garlic powder, salt, pepper, and Worcestershire sauce. Stir to combine.
In a separate bowl, whisk together the blended cottage cheese, optional softened cream cheese, and eggs until smooth. Pour into the beef mixture and stir to coat everything evenly.
Transfer the mixture to your prepared casserole dish. Sprinkle the shredded cheese evenly over the top.
Bake for 20 to 25 minutes, until the cheese is melted, bubbly, and slightly golden.
Let cool for a few minutes before serving.