Preheat oven to 375°F/190°C, and generously butter the inside of a 2-quart baking dish.
In a medium sized bowl, stir together the oats, baking powder, cinnamon, salt, and brown sugar. Set aside.
In a separate bowl whisk together the milk, eggs, vanilla, honey, and butter.
Layer half the berries in a 2-quart baking dish and top evenly with the dry oat mixture. Pour in the wet mixture, then add the rest of the berries on top.
Bake for 25-30 minutes or until the oats has absorbed the liquid. Serve hot or cold!