Butter four 200ml ramekins or ovenproof dishes, or six 150ml ones. Set the dishes on a baking tray to make them easier to remove from the oven. Melt the butter in a heavy-based pan, stir in the flour and cook, stirring, for 1 min. Slowly mix in the milk to make a thick sauce. Simmer for 2 mins to cook the flour.
Remove from the heat and stir in the parsley, spring onions, goats cheese, egg yolks, threequarters of the parmesan and seasoning.
Whisk the egg whites until they are stiff, then fold into the sauce in three batches, cutting through the mixture each time to incorporate the egg white without losing too much air from the mix. Divide between the prepared dishes and sprinkle with the remaining parmesan.
Bake for 20 mins for the small dishes and 25 mins for the larger ones until risen and golden.
