Ingredients

• 2 tablespoons butter

• 1 onion, quartered

• 1 apple, cut into chunks

• 3 stalks celery, chopped

• 2 cups chicken broth

• 1 (.87 ounce) package turkey gravy mix

• 2 teaspoons kosher salt

• 2 teaspoons dried thyme

• 2 teaspoons dried rosemary

• 1 teaspoon ground black pepper

• 1 teaspoon dried sage

• ½ teaspoon garlic powder

• 1 (3 pound) frozen boneless turkey breast (such as Butterball®)

• 1 cup water

• ½ cup quick-mixing flour (such as Wondra®)