Put rice on a sieve, wash under running water and drain. Put milk and lemon peel in a pot. Cut the vanilla pod lengthwise, scrape the pulp into the milk and add the pod.
Bring milk to the boil, add rice and bring to the boil again. Leave to swell for 30-40 minutes over low heat, stirring occasionally. Meanwhile clean, wash and drain gooseberries. Bring gooseberries, 75 g sugar and 3/8 litres apple juice to the boil.
Simmer at medium heat for about 3 minutes. Stir sauce powder and remaining juice until smooth, stir into the gooseberry compote and cook for another 1 minute. Pour into a bowl and allow to cool. Roast the almonds in a pan without fat, take them out and let them cool down.
Separate the eggs and mix the egg yolk with 1-2 tablespoons of the finished rice pudding. Stir into the remaining rice pudding together with 25 g sugar. Remove from the heat. Beat the egg white until stiff and finally add 1 tablespoon of sugar.
Fold the beaten egg white into the rice pudding and place in two greased, ovenproof baking dishes. Sprinkle with almonds. Bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 8-10 minutes.
Decorate with melissa and serve with gooseberry compote.