Step 1Place chicken pieces in Dutch oven. Add water to almost cover and 1 1/2 teaspoons salt. Cover and cook until chicken is just done, about 25 minutes. Set aside. (If there is much liquid, drain it off.)
Step 2Combine tomatoes, onion, peppers, pepitoria, sesame seeds, cinnamon stick, chocolate, achiote paste, chicken stock, 1 teaspoon salt and clove. Bring to boil and simmer 15 minutes. Remove from heat. Blend in a food processor or blender and strain through medium sieve. Taste for seasoning. Sauce should not be too thick or too thin. Set aside.
Step 3When ready to serve, add vermouth to chicken in pot. Simmer 3 minutes, then add sauce and cook 5 minutes longer.