Wash, halve, stone and quarter the plums. Boil plums in 3/4 litre water and sugar. Cook at low heat for about 5 minutes. Stir cornflour in a little cold water until smooth and add to the plums while stirring.
Bring to the boil briefly. Season plum cold peel with lemon juice and let it cool down. Bring milk and sugar to the boil for the dumplings. Add rice and let it swell for about 30 minutes at low heat.
Roast the almonds in a pan without fat until golden brown. Pour onto a plate. Add almonds, lemon zest and bitter almond oil to the rice and mix. Let it cool down a little bit, then cut off dumplings with a tablespoon.
Serve plum cold dish together with the almond rice dumplings.