Olive Brined Turkey with Gravy

Ingredients

• 1/4 cup kosher salt
• 1/2 cup granulated sugar
• 4 (16 ounce) jars Imported Spanish Queen Martini Olives
• 6 strips of lemon peel
• 4 bay leaves
• 1 tablespoon whole black peppercorns
• 1 (14-16 lb) turkey
• neck and giblets removed
• Salt
• pepper
• 2 sticks unsalted butter at room temperature
• 1 cup chicken or turkey stock plus more as needed
• 1 stick unsalted butter
• 3/4 cup all-purpose flour
• 4 cups chicken or turkey stock