Sift the flour and baking powder into a bowl and mix in the milk and egg yolks to make a thick batter.
Whisk the egg whites in a bowl until soft peaks form when the whisk is removed. Gently fold the egg whites into the batter along with the artichokes, rosemary and seasoning.
Heat the oil in a blini pan or small frying pan and fry large spoonfuls of the mixture for 2-3 minutes on both sides, or until golden-brown and crisp all over.
Serve with the cheese, rocket and walnuts scattered on top.
