Creating Oven Baked Hamburger Steaks is simple if you follow these easy steps:

1. Preheat the Oven: Preheat your oven to 375°F (190°C).
2. Prepare the Mixture: In a large bowl, combine the ground beef, chopped onion, minced garlic, Worcestershire sauce, salt, pepper, onion powder, garlic powder, breadcrumbs, and beaten egg. Mix until just combined.
3. Form Patties: Divide the mixture into equal portions and shape them into patties, about 1-inch thick.
4. Prepare the Baking Dish: Lightly grease a baking dish with vegetable oil to prevent sticking.
5. Arrange Patties: Place the patties in the prepared baking dish, making sure they are evenly spaced.
6. Bake: Place the dish in the preheated oven and bake for 25-30 minutes, or until the internal temperature reaches 160°F (71°C).
7. Make the Gravy: In a saucepan, bring beef broth to a simmer. If you prefer a thicker gravy, mix cornstarch with a little cold water to create a slurry and stir it into the broth. Cook until thickened.
8. Serve: Once the patties are done, remove them from the oven and let them sit for a few minutes. Pour the gravy over the patties just before serving.

These steps will guide you in creating Oven Baked Hamburger Steaks that are not only delicious but also easy to make!