Step 1Heat the oven to 400 degrees. Place a well-seasoned heavy cast-iron skillet in the oven to heat.
Step 2Beat the milk, eggs and vanilla in a mixing bowl until thoroughly mixed. Add the flour, granulated sugar and the salt slowly and continue to beat until light and smooth.
Step 3Add the butter to the skillet and return it to the oven briefly, just until the butter has melted. Remove the skillet and quickly swirl the butter to coat the bottom and sides. Pour in the batter. Return the skillet to the oven and bake until golden brown, 18 to 20 minutes. Do not open the oven while the Dutch Baby is baking, as it may deflate.
Step 4Meanwhile, cook the sausages over dium heat until nicely browned and cooked through, 15 minutes.
Step 5Whip the cream in a small bowl and fold in 1 tablespoon of the powdered sugar. Set aside.
Step 6When the Dutch Baby is done, remove from the oven and fill the center cavity with the berries. Dust with the remaining powdered sugar, cut into wedges, and serve immediately. Pass the whipped cream as a garnish. Serve the sausages on the side.