Best Gumbo Recipe

Ingredients

• 4 tbsp. unsalted butter
• 1/4 c. all-purpose flour
• 1 small yellow onion, chopped
• 1 medium green bell pepper, seeds and ribs removed, chopped
• 2 stalks celery, finely sliced
• 12 oz. andouille sausage, sliced into 1/2" rounds
• 2 cloves garlic, finely chopped
• 1 tbsp. Cajun seasoning (without salt)
• Kosher salt
• Freshly ground black pepper
• 4 c. low-sodium chicken broth
• 1 (15-oz.) can fire-roasted diced tomatoes
• 1 bay leaf
• 1 lb. medium shrimp, peeled, deveined
• 3 scallions, sliced
• Cooked white rice, for serving