Creating the Amish Hamburger Steak Bake is simple if you follow these steps:

1. Preheat the Oven: Begin by preheating your oven to 350°F (175°C).
2. Prepare the Meat Mixture: In a large bowl, combine ground beef, chopped onion, breadcrumbs, milk, beaten egg, garlic powder, salt, and pepper. Mix until well combined.
3. Form Patties: Shape the mixture into patties, about 1 inch thick.
4. Brown the Patties: In a large skillet over medium heat, brown the patties on each side for about 4-5 minutes. Don’t cook them fully; they will finish cooking in the oven.
5. Combine Gravy Ingredients: In a separate bowl, whisk together the beef broth, cream of mushroom soup, and Worcestershire sauce.
6. Arrange in Baking Dish: Place the browned patties into a greased baking dish. Pour the gravy mixture over the patties evenly.
7. Bake: Cover the dish with aluminum foil and bake for 30 minutes. After 30 minutes, remove the foil, sprinkle shredded cheddar cheese on top, and bake for an additional 10-15 minutes until the cheese is melted and bubbly.
8. Garnish and Serve: Once done, remove from the oven and let it rest for a few minutes. Garnish with fresh parsley if desired.

This straightforward approach ensures your Amish Hamburger Steak Bake is both delicious and uncomplicated.