Creamy Cajun Chicken Soup - Bold & Comforting Flavor

Ingredients

• 2 tablespoons butter.
• 1 ½ cups holy trinity (½ cup onion, ½ cup celery, ½ cup bell pepper, chopped).
• 4 cloves garlic, minced.
• 2 tablespoons Cajun seasoning, divided.
• 2 cups chicken stock.
• 1 (14.5-ounce) can diced tomatoes (do not drain).
• 1 pound boneless, skinless chicken breasts, sliced thin.
• 1 tablespoon neutral oil (e.g., avocado or canola).
• 1 cup heavy cream or half-and-half, at room temperature.
• Chopped green onions (optional, for garnish).