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Heat oven to 180C/fan 160C/gas 4. Heat the oil in a large pan or wok, add onions, then fry for 5 mins until golden. Add pumpkin, parsnips and garlic and cook for a further 3 mins. Stir in beans, tomatoes, wine, stock, thyme, sugar and plenty of seasoning. Bring to the boil, then transfer to a large casserole dish, pressing the beans and vegetables beneath the liquid.
Sprinkle the top with breadcrumbs and grated cheese. Cover, then cook for 40 mins. Uncover, stir well and cook for a further 40 mins. Serve with garlic bread and stir-fried cabbage.