Preheat your oven to 375°F (190°C).

In a large skillet, brown the ground beef over medium heat for 5-7 minutes. Drain excess fat and set aside.

Bring a large pot of salted water to a boil, add the tortellini, and cook according to package directions, usually around 3-5 minutes. Drain and set aside.

In a mixing bowl, combine the marinara sauce, heavy cream, garlic powder, Italian seasoning, salt, and pepper. Stir well.

In a large baking dish, mix the cooked tortellini, ground beef, and sauce mixture until well-coated.

Top with shredded mozzarella and grated Parmesan cheese.

Bake uncovered for 20-25 minutes or until the cheese is melted and golden.

Let cool briefly, garnish with fresh parsley if desired, and serve hot.