1 (14 to 16 pound) frozen young turkey

For the brine:
1 cup kosher salt
1/2 cup light brown sugar
1 gallon vegetable stock
1 tablespoon black peppercorns
1 1/2 teaspoons allspice berries
1 1/2 teaspoons chopped candied ginger
1 gallon heavily iced water

For the aromatics:
1 red apple, sliced
1/2 onion, sliced
1 cinnamon stick
1 cup water
4 sprigs rosemary
6 leaves sage
Canola oil