Creole Chicken and Sausage Gumbo



⅓ cup all-purpose flour
6 bone-in, skin-on chicken thighs
6 ounces Kielbasa or Andouille sausage, sliced
3 ounces tomato paste
4 cups low-sodium chicken broth

1 medium yellow onion, thinly sliced
1 medium yellow bell pepper, diced
2 medium tomatoes, chopped
2 stalks celery (with leaves), chopped

4 cloves garlic, chopped
2 bay leaves
1 teaspoon salt + more to taste
½ teaspoon dried thyme
½ teaspoon cayenne pepper
½ teaspoon freshly ground black pepper
¼ teaspoon allspice

To Finish:
1 tablespoon white vinegar
⅓ cup chopped fresh parsley leaves
½ cup chopped green onion (scallion)