Heat 2 tbsp olive oil in a medium frying pan. Slice the leeks and add to the pan, cooking for 5 mins. Add the prawns and cook for 1 min more. Beat the eggs and whisk through half the cream cheese. Season to taste. Pour the mixture over the prawns and leeks, dot over the remaining cheese and cook on a medium heat for 5-8 mins. Finish under a medium-hot grill for 2 mins until just set with a slight wobble.