Salisbury Steak And Potato Skillet Recipe

ingredient :
2 tablespoons olive oil
1 lb ground beef
1 white onion, halved and sliced
4-6 medium Yukon Gold Potatoes
3 cups beef broth, divided
2 tablespoons ketchup
4 teaspoons Worcestershire sauce, divided
1 teaspoon garlic powder, divided
1/4 teaspoon dried thyme
3 tablespoons cornstarch
Kosher salt and freshly ground black pepper, to taste
PREPARATION