Press the Sauté button to heat the remaining liquid in the inner pot. As the liquid heats, combine the cornstarch and 1 tablespoon water in a small bowl. When the liquid starts to boil, add the cornstarch mixture, whisking constantly until the sauce thickens. Pour the sauce over the meat. Garnish with chopped parsley. Add additional pepperoncinis to the platter, if desired, and serve.