Preheat oven to 450 degrees F.
Place the turkey in a roasting pan.
Add apple, onion, and stick of butter in the turkey and tie up the legs.
In a medium bowl, combine herbs, garlic, lemon zest, and mayonnaise. Stir well to combine.
Lather turkey completely in mayonnaise mixture, completely covering the outside and inside.
Sprinkle with coarse sea salt and pepper. Don't be shy with this.
Bake in preheated oven for 30 minutes.
Reduce heat to 350 degrees and cook another 1 ½-2 hours, or until meat thermometer reads 165 degrees F in the breast and 175 degrees F in the thigh. Cook time will depend on how large your bird is.
Cover with foil and let rest for 20 minutes.
Reserve juices for gravy!
*To make the gravy:
Combine ¼ cup of flour and 1 cup of waterin a mason jar and shake until well combined.
Add turkey drippings to a medium pan over medium heat.
Add flour/water mixture, stirring well until combined.
Cook until slightly thickened.
Season with salt and pepper, to your taste.
Enjoy!