Preheat the oven to 400 degrees F. Lightly butter a 9-inch shallow baking dish. Set aside.
In a food processor or blender, combine the milk, ricotta, eggs, sugar, flour, vanilla and salt and process until smooth.
Spread the berries evenly over the bottom of the prepared baking dish. Pour the batter evenly over the top. Sprinkle the top with the cinnamon sugar. Bake until puffed, golden brown and set in the center, about 35-40 minutes. Remove from oven and allow to cool briefly on a rack.
Serve warm, room temperature, or chilled, cut into wedges.
Enjoy using different fruits, such as peaches, plums and cherries or a combination. Instead of a cinnamon-sugar topping, dust with powdered sugar after baking.
If served hot, serve with a bit of cream.