sweet potato quiche

• Preheat the oven to 200C/180C Fan/Gas 6. Line a 20cm flan dish with the pastry. Prick the base all over with a fork and cover with baking paper. Weigh down with baking beans or uncooked rice.
• Bake for 10 mins. Remove the beans and paper and return to the oven for 5 mins. Set aside to cool slightly.
• Reduce the oven to 180C/ 160C Fan/Gas 4. Heat the oil in a large nonstick frying pan nd gently fry the sweet potato for 10 mins.
• Add the onion and cook for a further 5 mins, stirring occasionally until tender and just starting to colour. Add the spinach and cook for 1 min. Transfer to the pastry case.
• In a jug, whisk together the buttermilk, eggs and parsley. Pour over the filling in the pastry case then sprinkle over the feta.
• Cook in the oven for 25 mins or until the filling has just set through to the middle. Serve straight away or leave to cool for later.