In a hot stockpot, render the bacon for 5 minutes. Add the onions, celery, carrots, and parsnips. Saute for 10 minutes or until the vegetables are soft and wilted. Season with salt and cayenne. Add the bay leaves. Stir in the flour and cook for 10 minutes, stirring occasionally. Stir in the chicken stock. Add the sweet potatoes and potatoes. Bring the liquid up to a simmer and cook for 15 minutes.
Stir in the half-and-half, parsley, hot pepper sauce, and Worcestershire sauce. Garnish the soup with fried beet chips.