1 Heat the oven to 180°C (160°C in a fan oven), 350°F, gas 4 and brush a baking dish with butter and sprinkle with flour.
2 Quickly blanche the cabbage in salted, boiling water and then drain.
3 Mix together the butter and the egg yolks until creamy. Add a pinch of nutmeg, the cabbage and the pistachios. Alternately add the cheese, cream and creme fraiche.
4 Beat the egg whites until stiff and fold them into the mixture along with the flour. Season with a pinch of salt. Pour the mixture into the baking dish and bake for 40-45 minutes. Serve immediately.