This recipe uses a 'pumped' turkey breast, or one that has already been brined. The package will state 'contains up to 8% of a solution of water, salt, spices to enhance tenderness and juiciness'. Normally I would use a natural turkey that does not contain such a solution, but the goal was to make as easy a turkey breast as possible.
Do not cover the turkey breast with foil as it rests as this will cause the skin to get soggy.