Poulet a la Catalane

Name: Poulet a la Catalane
Ingredients: 1 free-range chicken, cut into large pieces, leaving skin on; Olive oil, for sauteeing; 1 slice smoked duck breast, roughly chopped; 1 large onion, chopped; 2 cloves garlic, chopped; 1 slice unsmoked bacon, cut into cubes; 5 tomatoes, peeled and pureed; 1 cup tomato concentrate/puree; 2 1/4 cups water, plus 2 cups water, for blanching; 1 1/2 tablespoons all-purpose flour, for thickening; Pinch salt; Freshly ground black pepper; 2 bitter oranges, blanched *see cooks note (recommended: Bigerades); Serving suggestion: boiled potatoes