Twice Cooked Parsley Prawns and Octopus with Potato Mash

Ingredients

• 2 medium octopus (750g total)
• ¼ cup white or apple cider vinegar
• 12 large raw peeled prawns
• 400 g potatoes, peeled
• Salt
• 40 g butter
• Olive oil
• 1 packet Gourmet Garden Parsle
• ¼ tsp salt
• ¼ tsp ground black pepper
• 1 lemon, cut into wedges