Easy Healthy Leftover Turkey Casserole (No Canned Soup)

Ingredients

• 1 1/2 Tbsp unsalted butter
• 1 1/2 Tbsp olive oil
• 1 medium yellow onion, peeled and finely chopped
• 2 medium carrots, peeled and chopped
• 2 stalks medium celery, washed and chopped
• 1 tsp dried thyme
• 1/2 tsp freshly ground black pepper, plus more to taste
• 1/4 tsp garlic powder
• 1/4 tsp cayenne pepper, optional
• 1/4 cup gluten-free all purpose flour
• 2 garlic cloves, finely minced
• 2 cups unsalted chicken broth
• 1 cup 1% milk
• 1 lb cooked boneless, skinless turkey breast (about 4 cups), shredded or diced
• 1 cup frozen peas
• 8 oz dry chickpea pasta shells
• Non-stick cooking spray
• Fresh thyme sprigs, for garnish (optional)
• 1/2 cup gluten-free panko bread crumbs
• 1/2 tsp dried thyme
• 1/2 tsp freshly ground black pepper
• 1/2 Tbsp olive oil