Experience the all-time favorite copycat recipe of Kansas City's Plaza III Steakhouse steak soup that you can make in your very own kitchen.
Place carrots and onions in a pan of boiling water and parboil for 4 minutes.
Brown beef in stock pot, drain grease and set aside. Melt butter in stock pot on medium heat and slowly add flour to make a thick roux. Gradually add water a little bit at a time and whisk until smooth to make the soup base.
Add diced tomatoes, pepper, Accent, beef base and browned beef to soup base and bring to a rolling boil. Immediately reduce heat and simmer for about 1 hour stirring occasionally. Finally, add frozen mixed vegetables the last 15 minutes. Serve immediately and enjoy!