1/2 cup kosher salt
1 pint pineapple orange juice
15 whole black peppercorns
1 bunch fresh thyme
4 cloves garlic, smashed
1 (5 1/2 to 6 pound) frozen Long Island Duck, thawed
2 handfuls shredded chard
2 shallots, minced
Dash sherry or balsamic vinegar