I know there was a thread about this last year, but I can’t find it.
And I know you said “grill” but this is my method. I use an oven.
You need a box of Reynold’s Cooking Bags, the turkey size (not the “large” size, be sure it says “turkey size” on the box). You can find them in the aisle with foil and plastic wrap.
I do all this the night before, so it’s ready to go Thanksgiving Day, and then take it out of the fridge about an hour before I put it in the oven to let it get to room temperature.
First, make sure it’s thawed. Take out the various body parts that are packed inside. You can throw them away.
Rinse the turkey inside and out.
Coarsley chop about 5 ribs of celery, and a couple of medium onions. Prepare the cooking bag as directed on the box.
You add a tablespoon or two of flour and shake it around. Put the bag, open end draped over the end, in a large roasting pan.
Add some of the celery and onions for the turkey to sit on, and set the pan aside.
Rub it all over with canola oil or another neutral oil. Sprinkle all over with kosher salt, fresh-cracked black pepper and a little powdered garlic (NOT garlic salt).
Then put the turkey in the bag. You will need two people for this, unless you’re lucky enough to have four hands. Two hands hold the bag open and two hands put the turkey in the bag.
It’s a little tricky, and the bird is slippery from the oil, so be careful. You can stick one hand inside the body cavity to make lifting it easier.
Then you put the rest of the chopped celery and onions inside the turkey, along with a stick of chopped up butter or magarine. Add some fresh rosemary (about a couple of tablespoons), some more salt and pepper, and some finely chopped fresh garlic.
Tie the bag shut with the little twist-tie included and cut some slits in the top, according to the directions.
Cook according to the directions on the box, according to how much your turkey weighs. I usually get a 20-pound turkey and it cooks in about 2½ hours.
The bag will keep the turkey moist, and also reduces cooking time from a regular open roasting. I’ve used the cooking bags for years and always have a moist turkey. I swear by them.
Be sure to let it rest for at least half an hour after you take it out of the oven, before slicing, regardless of how you end up cooking your turkey. This lets the juices redistribute and keeps the meat moist.
I never, ever stuff my turkey. Adding the aromatic veggies and rosemary make the meat taste really good, too.
I prefer making the stuffing separate. Stuffing it also increases cooking time, potentially drying out the turkey.