Preheat your oven to 375°F (190°C) to ensure it’s hot when you're ready to bake.
In a sizable mixing bowl, combine 1 lb of ground beef, 1 cup of breadcrumbs, the finely chopped small onion, 1 large egg, 1 teaspoon of garlic powder, 1 teaspoon of Worcestershire sauce, and a sprinkling of salt and black pepper. Use your hands or a spatula to mix the ingredients until they are fully combined and the mixture is cohesive.
Shape the mixture into oval-shaped patties, about ½ inch thick, and set them aside on a plate.
Heat a large skillet over medium heat and add the patties, cooking for approximately 3-4 minutes per side until they are nicely browned. Do not worry about cooking them completely at this stage; they will finish cooking in the oven.
While the patties are browning, prepare the sauce. In a separate bowl, whisk together 2 cups of beef broth, 1 can of cream of mushroom soup, and 1 tablespoon of soy sauce until smooth and well incorporated.
In a large baking dish, arrange the browned hamburger patties in a single layer. Carefully pour the mushroom soup mixture over the top, ensuring each patty is well covered.
Evenly distribute the 2 cups of frozen mixed vegetables over the patty and soup layer, making sure they are fluffed and spread out.
Cover the entire baking dish tightly with aluminum foil and place it in the preheated oven. Bake for 30 minutes to allow the flavors to meld and for the patties to cook through.
After 30 minutes, carefully remove the foil and sprinkle 1 cup of shredded sharp cheddar cheese evenly over the top of the bake. Return the dish to the oven and bake uncovered for an additional 10-15 minutes, or until the cheese is melted, bubbly, and golden.
Once cooked, take the baking dish out of the oven and let it cool for a few minutes to settle the dish. Before serving, garnish with freshly chopped parsley or chives to elevate the presentation.
Notes
Garnish with fresh parsley or chives for added flavor.