1. Warm the milk in a saucepan but don't boil it.
2. Whisk the eggs and sugar lightly in a basin; pour on the hot milk, stirring all the time.
3. Strain the mixture into a greased ovenproof dish, sprinkle the nutmeg on top and bake in the oven at 170°C (325°F) mark 3 for about 45 minutes, or until set and firm to the touch.