Catfish Étouffée

Name: Catfish Étouffée
Ingredients: 1 tablespoon olive oil; 1 cup chopped onion; 1 cup chopped green bell pepper; 1 cup chopped celery; 1 (14.5 ounce) can diced tomatoes; 0.25 cup low-sodium chicken broth; 1.5 tablespoons Louisiana-style hot sauce; 0.5 teaspoon dried thyme, crushed; 0.25 teaspoon Worcestershire sauce; 0.25 teaspoon salt; 0.25 teaspoon ground black pepper; 1.5 pounds catfish, cut into 6 pieces; 2 tablespoons chopped fresh parsley; 3 cups cooked riced cauliflower; 0.25 cup sliced green onion