Sous Vide Octopus Potato Salad

Ingredients

• 1 pound octopus tentacles
• 2 pounds Yukon Gold potatoes, cut into 1/2-inch cubes
• 1/4 cup plus 1 tablespoon extra virgin olive oil
• 4 tablespoons sherry vinegar
• 2 tablespoons creamy Dijon mustard
• 1 tablespoon chopped fresh parsley
• 1 tablespoon chopped fresh tarragon
• 1 teaspoon smoked paprika
• Kosher salt and freshly ground black pepper
• 1/2 red onion, thinly sliced