Round Steak and Mushrooms

Bahan-bahan (4 porsi)

• 2 pounds round steak
• salt and black pepper (to taste)
• 1 tablespoon olive oil (more as needed)
• 8 ounces mushrooms (sliced)
• 1 yellow onion (sliced)
• 1 tablespoon butter
• 2 ¼ cups reduced sodium beef broth
• ½ teaspoon dried thyme leaves
• 1 tablespoon Worcestershire sauce
• 2 tablespoons cornstarch