How long do I preheat my Roasting Basket? You will want to preheat the grill with the Roasting Basket in place for approximately 10-15 minutes. Related articles Why isn’t my Roasting Basket fitting properly? How should I clean my Roasting Basket? How can I deep clean my Roasting Basket? How hot should my gas grill get? Why is my Roasting Basket changing color?