Heart-Healthy Chicken Casserole | Easy One-Dish Meal

Ingredients

• Non-stick cooking spray
• 1 Tbsp olive oil, divided
• 1 medium green bell pepper, stemmed, seeded and diced
• 1 medium yellow onion, peeled and diced
• 2 medium celery stalks, washed and diced
• 4 large garlic cloves, peeled and finely minced
• 4 cups cooked, shredded boneless, skinless chicken breast (about 1 1/2 lbs)
• 1 can (10.5 oz) unsalted cream of mushroom soup (gluten free if needed)
• 8 oz reduced fat sour cream
• 1/4 cup water
• 1 tsp freshly ground black pepper, divided
• 1 cup roughly crushed gluten-free corn flakes
• 1/2 Tbsp paprika
• 2 Tbsp chopped fresh chives or parsley, for garnish (optional)