Homestyle Salisbury Steaks | Easier Eats

Ingredients

• 1 pound lean ground beef
• 1/4 cup panko breadcrumbs
• 2 tablespoons tomato paste
• 2 teaspoons Worcestershire sauce, divided
• 1 teaspoon ground mustard
• 1/2 teaspoon onion powder
• 1/2 teaspoon ground black pepper, plus more, to taste
• kosher salt, to taste
• 1 teaspoon olive oil
• 1 large Vidalia onion, diced
• 4 ounces white mushrooms, sliced
• 1 teaspoon fresh thyme leaves, chopped, plus more, to taste, for garnish
• 1/2 teaspoon garlic powder
• 2 1/2 tablespoons flour
• 3 cups beef stock
• 1 tablespoon butter
• mashed potatoes, optional, to taste, cooked and hot, for serving