Preheat the electric roaster to its highest temperature. (Most roasters go up to 450°F.)
In a small bowl, combine the olive oil and baking powder until well mixed. Brush it all over the turkey.
Place the quartered oranges and fresh herbs, like thyme, rosemary, and sage into the cavity of the turkey.
Carefully place the rack in the roaster and put the prepared turkey in the pan, breast side down. (Be careful, as the roaster is super hot!! And make sure the handles of the rack are up and not under the bird.)
Cover and cook the bird for 30 minutes.
Using two pairs of kitchen tongs, flip the turkey breast side up. Quickly cover and lower the temperature to 325°F.
Continue roasting until the internal temperature reaches 180°F in the thigh and 165°F in the breast. (Don’t be tempted to open the lid for too long or often, as the roaster oven will lose its heat and it will extend the cooking time.)
Carefully lift the bird from the roaster oven using the handles of the rack. Cover with foil and rest for at least 30 minutes before slicing and serving.
Strain the drippings for an amazing turkey gravy!