Preheat oven to Gas mark 6, 200° C.
Place a layer of sliced potatoes in the bottom of an ovenproof dish, season with black pepper and add a layer of sliced onions, then a layer of sliced carrots. Repeat these layers and season with black pepper.
Finish with a layer of sliced potatoes. Pour the made up beef bourguignon mix over the layers and cover with a lid or foil and cook in the preheated oven for 60 minutes.
Remove the lid, brush with melted butter and cook for a further 15 minutes until the top layer of potato is brown.
]Serve with marrowfat peas or baked beans.