1-Preheat your oven to 350°F/180°C with a: Preheat your oven to 350°F/180°C with a rack in the middle. Generously butter a 8-9 inch (20.5-23cm) circular/oval baking dish or skillet.
2-In a large mixing bowl, whisk together: In a large mixing bowl, whisk together the milk, sugar, eggs and vanilla extract. Add the flour and salt, in small additions, and whisk until smooth. You should have a smooth batter with the consistency of heavy cream. If the batter ends up being lumpy, you can simply pass it though a fine mesh strainer to get rid of any lumps.
3-Place the halved strawberries at the bottom: Place the halved strawberries at the bottom of the prepared dish and pour batter over top.
4-Bake for 1 hour: Bake for 1 hour. The Flaugnarde is done when puffed and brown on the edges. The center should still be slightly wobbly.
5-Transfer to a cooling rack: Transfer to a cooling rack. The Flaugnarde will deflate as it cools.
6-Serve warm or cool, dusted with powdered: Serve warm or cool, dusted with powdered sugar. You can cut it into slices, just like a cake, or simply enjoy it by the spoonful.