Easy Gumbo Recipe

Name: Easy Gumbo Recipe
Prep time: 20 min
Total time: 20 min
Cuisine: American, Southern
Ingredients: 4 tbsp. butter; 1/4 c. all-purpose flour; 1 small yellow onion; 1 medium green bell pepper, chopped; 2 celery ribs, chopped; 2 cloves garlic, minced; 12 oz. andouille sausage, sliced into 1/2" pieces; 1 tbsp. cajun seasoning (without salt); Kosher salt; Freshly ground black pepper; 1 bay leaf; 1 (15-oz.) can fire-roasted diced tomatoes; 4 c. low-sodium chicken broth; 1 lb. medium shrimp, peeled and deveined; 3 green onions, sliced; cooked white rice, for serving