Preheat the oven to 450 degrees fahrenheit and put a 9 inch skillet on the middle rack of the hot oven.
Blend together eggs, milk, flour, sugar, salt, zest and vanilla.
Mix for about 1 minute until frothy.
When the oven comes to temperature, remove the hot pan.
Coat the heated skillet with melted butter, add the blueberries and then the pancake batter.
Bake for 15 minutes or until the pancake is golden brown and puffy.
Serve warm with butter, syrup and a sprinkle of icing sugar.