Healthy Comfort Food Casserole

Ingredients

• 10 ounces whole-wheat French bread, cut into small cubes
• 1 tablespoon butter
• 1 medium onion, minced
• 2 large stalks celery, minced
• 8 fresh sage leaves, minced
• 1/2 cup parsley, chopped
• 1 teaspoon turkey seasoning
• 1/4 teaspoon kosher salt
• 1/4 teaspoon fresh pepper, to taste
• 1 large egg, beaten
• 1 1/2 cups chicken broth
• 1 tablespoon olive oil
• 2 large shallots, chopped
• 1/4 cup fresh parsley, chopped
• 2 tablespoons fresh thyme, chopped
• 2 tablespoons fresh sage, chopped
• 3 stalks celery, chopped
• 1 (8-ounce) package frozen mixed vegetables
• 5 cups turkey breast, cooked and diced
• 3 cups turkey or chicken broth, divided
• 1/2 teaspoon kosher salt
• 1/8 teaspoon black pepper
• 1/4 cup cornstarch