Step 1

In a small bowl, soak bread in broth. Tear with your hands until it resembles a soft paste.

Step 2

In a large bowl, combine ground beef, soaked bread, onions, egg, salt, and pepper. Gently mix until combined.

Step 3

Divide meat into portions and shape into patties. With your thumb, gently press in the center of each patty to make a slight indentation.

Step 4

In a skillet over medium heat, heat oil. Add mushrooms and cook, stirring regularly, for about 1 to 2 minutes. With a slotted spoon, remove from pan and keep warm.

Step 5

Add beef patties in a single layer and cook for about 1 to 2 minutes on each side or until lightly browned but not cooked through. Remove burgers from pan and drain on paper towels. Keep warm.

Step 6

In a saucepan over medium heat, heat the butter until melted. Sprinkle in the flour and whisk until smooth and blended. Continue to cook, stirring regularly, for about 2 to 3 minutes or until roux turns lightly golden.

Step 7

Slowly add beef stock, whisk until smooth, and continue to cook until sauce begins to thicken. Add salt and pepper for the gravy.

Step 8

Add meat patties in a single layer in the pan. Lower heat, cover, and continue to cook for about 10 to 15 minutes or until meat is fully cooked.

Step 9

Add mushrooms during the last 5 minutes and cook until heated through. Serve hot.