Stuffed Grilled Pork Chops

1 cup salt

1 cup brown sugar

1 tablespoon black peppercorns

1 tablespoon mustard powder

2 cups cider vinegar, heated

1 pound ice cubes

1 1/2 cups cornbread, crumbled

2 tablespoons golden raisins

1/4 cup walnuts, roughly chopped

1/4 cup dried cherries, halved

1/4 cup buttermilk

1/2 teaspoon ground pepper

2 teaspoons fresh sage, thinly sliced

1/2 teaspoon kosher salt