Mix flour and baking powder. Add eggs, milk and salt and mix to a smooth dough. Leave to rise for about 10 minutes. Wash, halve and stone the plums. Roast the oat flakes in a pan without fat, remove.
Heat 1 tablespoon of fat in a pan (20 cm Ø). Place 8 plum halves in the pan with the cut surface facing down, pour 1/4 of the dough over them. Fry over medium heat for 3-4 minutes, turning.
Sprinkle with oatmeal. Fry for another 2 minutes. Keep pancakes warm. Fry another 3 pancakes in the same way. Wash the mint and cut some leaves into strips. Drizzle the pancakes with maple syrup and sprinkle them with mint strips and leaves and serve.