Jamie Oliver's Chicken and Leek Stroganoff

sea salt

long grain or basmati rice (I used brown basmati rice)

large leek

big handful of crimini or oyster mushrooms (I used pre-sliced white mushrooms)

chicken breasts (I used the equivalent amount of chicken tenders from the butcher)

olive oil

pat of butter

glass of white wine

freshly ground black pepper

bunch of fresh parsley

heavy cream

lemon