Prepare sifted flour with salt, egg yolks, milk and sugar to a smooth dough. Mix in 2 tbsp. liquid butter. Beat 2 egg whites with a little sugar until stiff peaks form and fold into the batter. In a coated frying pan, finish baking small pancakes topped with apples, cover and keep warm.
For the cinnamon foam: beat the egg yolks with the sugar and cinnamon until creamy. Add the Marsala and beat over a bain-marie until thick and creamy.
Sprinkle the apple pancakes with a tiny bit of powdered sugar and place on a plate with the cinnamon foam. Bring to the table garnished with lemon balm.