Name: Mushroom Salisbury Steak
Prep time: 15 min
Cook time: 20 min
Total time: 35 min
Yield: 6 servings
Ingredients: 2 tablespoons butter; 1 1/4 cups mushrooms (thinly sliced); 1 onion (thinly sliced); 1 10 1/2 ounce can condensed beef broth; 1 1/2 lbs ground beef; 1/2 cup Panko bread crumbs; 1 egg; 1/4 teaspoon black pepper; 1 tablespoon all-purpose flour; 1/4 cup ketchup; 2 teaspoons Worcestershire sauce; 1/2 teaspoon mustard powder; 1/3 cup water