steak and potato soup

tweaked from a Mr. Food cookbook
6-7 servings
INGREDIENTS:
2 tablespoons butter
one 8 ounce strip steak well trimmed and thinly sliced
1 large onion or 2 small
5 cups beef broth or stock
1 package (24 ounces) frozen steak fries, broken into bite sized pieces
1/2 teaspoon black pepper
shredded mozzarella cheese

1. Melt the butter in a soup pot over high heat. Add the steak and onions and cook for 5-6 minutes or until the steak is no longer pink. Add the remaining ingredients; mix well. Bring to a boil and boil for 6-8 minutes or until heated through. Sprinkle with mozzarella cheese before serving.