Chicken and Sausage Gumbo

Name: Chicken and Sausage Gumbo
Ingredients: * 1 1/2 cup white rice, dry; * 2 tablespoon plus 1/4 cup olive oil, divided; * 3 chicken thigh; * kosher salt; * freshly ground black pepper; * 1 pound andouille sausage, sliced thick on the diagonal; * 1/3 cup all purpose flour; * 1 large yellow onion, chopped; * 8 garlic clove, minced; * 2 large carrot, chopped; * 4 celery stalk, chopped; * 4 cup chicken broth; * 4 cup water; * 4 thyme sprig; * 1 bay leaf; * 2 tablespoon sriracha; * 4 scallion, chopped