Ingredients for - Curried prawn & green bean pie

1. 3 tbsp olive oil
2. 1 onion , finely sliced
3. 40g plain flour
4. 3 tbsp medium curry paste
5. 600ml milk
6. 150g green beans , cut into 3cm pieces
7. 1.2kg Maris Piper potatoes , cut into 2cm chunks
8. 1 heaped tsp turmeric
9. 1 tsp nigella seeds
10. 300g raw king prawns
11. ½ small bunch coriander , finely chopped
12. 2 tbsp half-fat crème fraîche

How to cook deliciously - Curried prawn & green bean pie

1 . Stage

Heat 2 tbsp of the oil in a medium saucepan. Add the onion and a pinch of salt and fry over a medium heat for 8 mins, or until the onions turn golden and sticky. Stir the flour and curry paste into the onions and cook for 2 mins. Remove from the heat and quickly whisk through the milk in several additions to make a thick sauce.

2 . Stage

Bring a large pan of water to the boil, add the beans and cook for 1 min, then scoop out with a slotted spoon and set aside. Add the potatoes to the water and cook for 5-6 mins or until you can easily insert a cutlery knife into them. Drain and mash. Stir through the remaining oil, turmeric and nigella seeds, then season to taste.

3 . Stage

Add the prawns and green beans to the sauce. Bring to a simmer and quickly remove from the heat. Stir through the coriander and crème fraîche and season to taste.

4 . Stage

Heat the grill to its highest setting. Spoon the mixture into a medium heatproof dish. Spread over the mashed potato and grill for 4-5 mins or until golden and bubbling.