Make Ahead Notes: The pea puree can be made 2 to 3 hours ahead. Drain peas and immediately rinse with plenty of cold water. Puree when cold with 1 tablespoon of the curry paste and creme fraiche or sour cream. Put in a bowl, cover and leave in a cool place or refrigerator. Reheat gently in a saucepan, taste and adjust seasoning before serving. If using sour cream, make sure the puree doesn't boil, otherwise it will turn grainy.