Put the rice in a saucepan with the milk. Bring to
the boil, stirring, and simmer for 30 minutes or
until the rice is tender and creamy.
Whisk in 30
ml/2 tbsp of the sugar and the egg yolks. Stir in
the lime rind and juice and turn into a baking dish
greased with the butter.
Whisk the egg whites until
stiff. Fold in half the remaining sugar and whisk
again until stiff and glossy.
Fold in the remaining
sugar and pile on top of the rice. Bake at
180°C/350°F/gas mark 4 for 15 minutes or until the
meringue is turning a pale golden brown. Serve hot.