First, place the turkey in a ziplock bag with buttermilk, 2 teaspoons of salt and garlic powder. Place in a bowl (to prevent spillage) overnight. The buttremilk tenderizes the turkey overnight so it is the juiciest turkey ever.
Next, take out the turkey from the ziplock bag and pat the turkey dry with an kitchen towel. Let the turkey sit out at room temp while you prepare the other ingredients.
Now, make the stuffing by combining all the stuffing ingredients and mixing. Spread stuffing out on half the sheet pan.
Next, poke holes in the sweet potatoes with a fork so it does not explode in the oven. Place the sweet potatoes on the empty part of sheet pan and drizzle with olive oil.
Now, add generous amounts of salt, pepper, and garlic powder to the turkey. Mix all the turkey butter ingredients together and smear all over the turkey. Then place turkey on top of the stuffing.
Next, place in preheated 350 degree oven on the middle rack for 1 hour and 30 minutes.
Now, take out sheet pan out and cut the sweet potatoes in half and scoop out their insides (keep skins intact to re-stuff).
Next, in a bowl, mix the sweet potatoes with butter, cinnamon, maple syrup, salt, and pepper and then restuff the 4 potato skins. Now top each with marshmallows. Place on the empty part of sheet pan leaving room for asaparagus.
Now, add asaparagus to empty space in the sheet pan (see picture steps above) and mix with oil, salt/pepper, and garlic powder.
Finally, place sheet pan in the oven and cook 30 more minutes. When finished cooking mix red wine vinegar with the asparagaus and enjoy a full Thanksgiving dinner on a sheet pan!