Split the vanilla beans in half, scrape the seeds and drop it in a saucepan along with the pods. Next, pour water in the pan, drop the plums and sprinkle sugar. Bring it to a boil and then simmer for 10 minutes. Check for sweetness and add more honey or sugar if you want.
For the pancakes, mix flour, sugar, salt and baking powder in a bowl. Next, crack the egg, pour melted butter along with milk and give it a mix.
Once the poached plum mixture is ready, start making the pancakes.
Bring a pan to medium heat and ladle ¼ cup of the batter. Once bubbles start to show on the edges of the pancakes (should take a couple minutes), flip it carefully and cook for 1 more minute. Transfer the pancakes in a plate and continue making more pancakes.