Confit Of Pork Parmentier

Name: Confit Of Pork Parmentier
Ingredients: 2 1/2 pounds whole pork loin; 2 yellow onions, julienned (about a cup); 5 garlic cloves, whole with skins removed; 6 thyme sprigs; 1 teaspoon whole black peppercorns; Canola oil, peanut oil, or lard; Reserved onions and garlic from confit oil; 2 teaspoons fresh parsley, minced; 1 teaspoon fresh thyme, minced; Kosher salt and freshly ground white pepper; 2 pounds Yukon Gold or Russet potatoes, peeled and sliced into 1/2-inch pieces; 4 tablespoons unsalted butter, cubed; 2 teaspoons Dijon mustard; 1 cup half and half