Carefully slide a large spoon between the skin and the breast of the turkey. Rub about 1/4 cup of butter in this space beneath the turkey skin, directly on the breast meat. Rub remaining butter all over the turkey.
Place half of a lemon, rosemary, and thyme inside the turkey cavity. Use kitchen string to tie the turkey legs together. You can also make a small cut in the turkey skin and push the legs through to hold them together.
Add to your roasting pan: water, quartered onions, lemon wedges, and garlic cloves (peeled and crushed).
Place turkey in roasting pan and coat liberally with poultry seasoning.
Bake for 3 1/2 to 4 hours. Keep covered for the first 2 hours. After removing the lid, baste turkey with its own juices every 20-30 minutes. If needed, baste spots that are not browning with olive oil.
Cook until turkey reaches an internal temperature of 165°F.
Remove from oven and let turkey rest for at least 45 minutes before carving.
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Notes
Note: Nutrition information is a rough estimate only; actual values will vary based on the exact ingredients used and amount of recipe prepared.
If turkey is not browning enough, broil for the last 5 minutes of cooking time to crisp the skin.
If turkey is browning too quickly, reduce oven temp to 300 or 325 and put the cover back on.