How to make
Heat the oven to 370°F (190 °C). Smear a baking dish with butter.
Boil the broccoli in salted water. Drain it and blend it along with the egg yolks. Mix with the Stilton, mustard, salt and black pepper.
Beat the egg whites with a mixer until you get a fluffy snow. Pour this on top of the other mixture and bake for 35 min.
