Mix all the sauce ingredients in a small bowl. Add the chicken to a large saute pan over medium heat and pour in the sauce. Bring to a boil. Lower the heat and simmer for 40 minutes, skimming off any fat that rises. Bring to a boil again and add the flour slurry, then lower the heat and let simmer for 10 minutes to thicken. Arrange the chicken in a deep serving platter and cover with the sauce.