Shrimp Etouffee

Name: Shrimp Etouffee
Prep time: 25 min
Cook time: 45 min
Total time: 1 h 10 min
Cuisine: American
Ingredients: 1/2 cup oil; 1/2 cup all-purpose flour, plus extra flour, optional; 1 cup chopped yellow onion; 1/2 cup chopped green bell pepper; 1 cup chopped celery; 3 cloves garlic, finely minced; 1/2 teaspoon black pepper; 1/2 teaspoon white pepper; 1/2 teaspoon cayenne pepper, more if desired; 1 teaspoon Cajun seasoning; 1/2 cup minced green onions, plus extra for garnish; 1/2 cup minced fresh parsley leaves; 2 to 3 dashes hot sauce (recommended: Tabasco); 1 (8-ounce) can clam juice; 1 (14.5-ounce) can diced tomatoes (recommended: Ro'tel); Salt (Cajun seasoning has salt already); 2 pounds small or medium shrimp peeled and deveined (recommended: (31/35 size count); 1/2 stick butter; Rice, optional; Diced green onions, for garnish