Heat the oven to 190°C / 375°F / Gas Mark 5. Put 2 tbsp olive oil in a bowl and add the butternut squash, season and mix well. Tip into a roasting tin and roast for 25 - 30 minutes, until just tender.
Meanwhile, in a large casserole, heat the remaining oil and stir fry the onions for 5 minutes or until soft. Add the mince and cook until browned about 10 minutes. Discard any excess fat.
Add the garlic, tomato puree and curry powder and cook for a further 1 minute.
Add the chopped tomatoes, mango chutney, drained apricots and milk. Bring to the boil and cook for about 20 minutes, top up with water if it begins to get too dry. Add the roasted butternut squash and taste and season. Spoon into a 1.5 litre ovenproof pie dish or smaller dishes for the freezer. Scatter with the grated cheese.
Cook for 20-25 minutes, until golden. Serve with a salad, baked potato or seasonal vegetables.