Step 1

Preheat the oven to 350 degrees Fahrenheit.

Step 2

In a large bowl, gently combine the ground beef, egg, Lawry’s seasoning, salt, and pepper. Be careful not to over-work the beef. Shape it into hamburger patties. Press your thumb into the center of each patty to form a depression. Chill for 10 minutes.

Step 3

Meanwhile, cook the mushrooms and onions over medium heat until the onions are translucent, about 5 minutes. Remove them from the heat.

Step 4

Cook the burger patties in a pan over heat on each side until browned, about 2 minutes. (They don't need to be cooked through since they will cook further in the oven.)

Step 5

Transfer the patties into a 9x13-inch baking dish and top with the sauteed mushrooms and onions.

Step 6

Top each patty with 1-2 slices of cheese. Bake for 10 minutes or until the cheese is melted. Enjoy!