Heat the oil and cook the onion and carrot for 5 minutes. Add the beef and brown. Break up using the back of a wooden spoon.
Add the salt, pepper, parsley, tomato chutney, and marmite. Stir through.
Mix the stock cube with the gravy powder and 400ml water. Add to the veg and leave to simmer.
Meanwhile peel the potatoes and boil vigorously in salted water. Mash with the milk, a little butter, and the cheese.
Stir the peas into the mince then transfer to a heatproof dish and smooth. Spoon over the mashed potatoes and fluff up the top with a fork. Scatter over the cheese / breadcrumb mix and bake for about 15 minutes in a hot oven until golden.