Heat cooking fat in a large pot or Dutch oven. Brown chicken pieces on all sides. Set chicken aside.
1 whole chicken, 3 tablespoon cooking fat
In the same pot, cook garlic and onions until onions are soft (around 5 minutes).
6 cloves garlic, 2 onions
Add chopped tomatoes, white wine, herbes de Provence, 1 teaspoon each of sea salt and freshly ground black pepper. simmer for 10 minutes, stirring occasionally.
32 oz tomatoes, 1 tablespoon herbs de Provence, 2 bay leaves, ½ cup white wine
Return chicken pieces to the pot and cook for another 45 minutes.
Stir in ¼ cup of homemade or Dijon mustard. Adjust seasoning with additional sea salt and freshly ground black pepper if desired. Serve.
¼ cup Dijon mustard, Sea salt and freshly ground black pepper