- 1 tablespoon olive oil
- 2 lbs ground beef
- 1 egg
- 1/2 cup panko breadcrumbs
- 1/4 cup milk
- 1 teaspoon onion powder
- 1 teaspoon garlic powder
- 1 teaspoon salt
- 1/2 teaspoon black pepper
- 8 ounces sliced mushrooms
- 1 small onion sliced
- 12 ounce container beef gravy
- 1/2 cup beef broth
- 1 tablespoon cornstarch
- 2 tablespoons water
- 2 tablespoons chopped fresh parsley