Sous Vide German Potato Salad

Ingredients

• 1 1/2 pounds waxy potatoes, diced
• Salt and freshly ground black pepper
• 2 slices bacon, thinly sliced into lardons
• 2 tablespoons (30 ml) extra virgin olive oil
• 1 small onion, finely diced
• 3 tablespoons (44 ml) apple cider vinegar, plus more to taste
• 1 tablespoon (15 ml) Dijon mustard
• 1 tablespoon (15 ml) coarsely ground mustard
• 2 tablespoons (30 ml) chopped fresh parsley