Mix the dry ingredients (flour, baking powder, sugar, salt) in a bowl.
Mix the milk with the mascarpone, the olive oil, the zest and the vanilla extract in another bowl.
Separate the egg, and add the egg yolk to the milk mixture. Keep the egg white apart.
Add the milk mixture to the dry components, and mix everything well.
Whisk the egg white until stiff, and mix it gently under the batter.
Take a little pan and heat water, sugar and balsamic vinegar for the berries.
Add the berries when the water is cooking and reduce the heat to let it simmer. When the berries become weak turn down the heat further and let the water reduce.
Bake the pancakes and serve with the compote.