Chef John’s Salisbury Steak
Ingredients: 1 pound 85% lean ground beef ½ teaspoon freshly ground black pepper 1 teaspoon dry mustard 2 tablespoons ketchup 1 tablespoon Worcestershire sauce 1 teaspoon soy sauce 1 large egg, beaten 1 pinch cayenne pepper, or to taste ½ cup plain bread crumbs 2 tablespoons salted butter 12 large white button mushrooms, sliced 1... » read more