Easy Slow Cooker Turkey Breast Recipe

Ingredients (9)

• 2 ribs celery (cut into 3-inch lengths)
• 2 carrots (cut into 3-inch lengths)
• 1 (4 to 5 pound) turkey breast (fully thawed or split turkey breast)
• 1/2 cup/4 ounces butter (melted)
• Kosher salt 
• Freshly ground black pepper
• 2 tablespoons cornstarch
• 2 tablespoons water
• 1/2 to 1 cup turkey stock (or chicken stock, as needed)