Roasted Cider-Brined Turkey with Madeira Gravy

Instructions:

Rinse turkey thoroughly under cold water. Trim excess fat and discard. Set aside.
In a large pot (at least 8 quarts) over high heat, stir together cider, vinegar, and brine seasonings. Warm brine until sugar and salt dissolve, about 5 minutes. Remove from heat, add 1 quart ice water, and cool to room temperature.
If your pot is large enough (and your refrigerator can accommodate it), put turkey in brine and refrigerate 12-24 hours. Otherwise, double-bag two plastic roasting bags and set them, openings up, into your roasting pan. Add turkey and pour brine in carefully. Close bags securely with tight knots or twist ties, and transfer pan to refrigerator for 12-24 hours, turning the turkey once during that time to make sure all parts are properly brined. When you're ready to roast, remove bird from brine and pat dry. Discard brine.

Instructions:

Preheat oven to 450°. Stuff turkey cavity with Sausage-Currant Brioche Dressing. Tie turkey legs together with kitchen twine.
In a small bowl, stir together butter and sage. Use your fingers to separate breast meat from skin and stuff butter under skin. Rub skin all over with olive oil, and sprinkle with salt and pepper.
Place turkey in roasting pan, breast side up. Pour broth (or stock) and Madeira into bottom of pan. Roast bird 30 minutes; then reduce heat to 350°. Insert a probe into the thickest part of the breast to monitor temperature.
Basting turkey every 20 minutes, roast until thermometer registers about 160° and leg joints feel loose, 2-2-1/2 hours longer for a 15-pound bird. If you like, you may bring the oven temperature up to 425° for the final 20 minutes of cooking to enhance browning.
Remove turkey from pan and cover with foil; let sit 30 minutes before carving. Reserve pan juices and and use them to make Madeira Gravy (see accompanying recipe, below). Serve turkey with dressing and gravy.