Place the whole potatoes in the slow cooker and cook on HIGH for 3 hrs or until tender when tested with a fork

Meanwhile, soak the broccoli and cauliflower in a bowl of boiling water for 5 mins. Drain and set aside.

Cut the potatoes in half length ways. Scoop out the centre with a teaspoon, leaving at least 5mm of potato flesh all round so the potatoes hold their shape. (Use the potato you remove for something else)

Fill the potato halves with broccoli and cauliflower. Line the slow cooker with baking paper and add the filled potatoes.

Make the cheese sauce according to the directions on the packet. Spoon the sauce over the potatoes. Top with Parmesan.

Cover, putting a tea towel under the lid, and cook on HIGH for 1 and 1/4 hrs, or until the vegetables are heated through and the cheese is melted