Work the egg yolks with the sugar, salt, flour, Grana Padano and melted butter, add the yeast, milk and whipped but still creamy egg whites.
Pour the mixture one ladle at a time into a small hot buttered pan, leave to brown on both sides, arrange the pancakes on a plate and leave to cool.
Peel the bananas and blend them with the sugar and lemon juice.
Peel the citrus fruits, cut the peels into julienne strips and blanch them in boiling water for 2 minutes.
Serve the pancakes with the citrus fruits, zest and banana cream.