In a large stock pot over medium heat, brown ground beef in the oil until browned.
Remove meat from pot.
Add the butter and flour to the pot and stir together until blended, then continue stirring until the flour loses its white color.
Immediately add the chicken broth & beef, stirring to combine completely.
Add the remaining ingredients, stir to combine, cover the pot, then turn heat down to low and simmer slowly for 15 minutes, stirring frequently.