To make the dutch baby, preheat the oven to 200C (400F). Place the butter into an 8 or 9 inch cast iron pan (or a similar sized baking dish), and place in the oven to heat up.
In a medium bowl, whisk together the flour, sugar and salt. Whisk in the eggs and vanilla seeds, followed by the milk, making sure there are no lumps.
When the butter in the pan has melted, carefully remove the pan from the oven, pour in the batter, and place it straight back in.
Bake for 18-–20 minutes, or until puffed up and golden.
While the pancake is baking, place the sugar, water and ginger for the syrup into a very small saucepan and stir together. Place over a low heat, until the liquid turns clear and just bubbles up. Place the berries into a serving dish, and pour over the syrup, then chill in the fridge.
When the pancake is ready, it will be puffy and huge, and golden - crisp at the edge, and custardy at the bottom. Slice into wedges, top with plenty of berries and syrup and dig in!
Recipe by The Sugar Hit at http://www.thesugarhit.com/dev/2015/12/vanilla-bean-dutch-baby-with-ginger-berry-salad.html