Wipe the bowl. Prepare a meringue mass from egg white, 2 teaspoons lemon juice and 150 g sugar.
Preheat oven (electric cooker: 100 °C/circulating air: not suitable/gas: see manufacturer). Line two trays with baking paper. Place 6 meringue piles on each tray with a tablespoon. Press light depressions in the middle. Bake in the hot oven in trays one after the other for about 1 1⁄4 hours. Take out of the oven and let it cool down on a cake rack.
In the meantime, wash, halve and stone the plums for the compote. Bring port wine, 1⁄4 l water, 75 g sugar, 1 sachet vanilla sugar and plums to the boil. Simmer for 3-4 minutes. Stir starch and 4 tbsp. water until smooth. Stir into the boiling liquid, bring to the boil again and simmer for about 1 minute. Leave to cool.
Whip the cream until semi-stiff, while pouring in 1 sachet of vanilla sugar. Carefully remove the pavlovas from the baking paper. Arrange them on a large plate, spread the cream as a blob on top and add some plum compote. Decorate with mint as desired. Serve the rest of the plum compote with it.