Pre-heat oven to gas mark 6/200°C/180°C fan.
Place potatoes in microwave and cook on full power for 4 minutes, then remove and allow to cool.
Heat oil in a large saucepan over a medium-high heat. Add butternut, pumpkin, onions, carrots, mushrooms, celery, parsnips, garlic, Worcester Sauce, mixed herbs and tomato puree and sauté for 5 minutes, until vegetables begin to brown.
Then add in tinned tomatoes, and vegetable stock and stir.
Let mixture simmer without boiling until sauce has reduced down.
Place the mixture into a small oven proof dish.
Thinly slice the cold potato and place on the top vegetable stew.
Bake in oven for 40 minutes, until golden brown.
Top Tip:
Make in bulk by doubling ingredients list to make 2 serves. Just remember to divide potato evenly between serves to get the right protein per serve.