Grate cheese. Separate eggs. Mix flour with milk, egg yolk and cheese. Season with salt and pepper, allow to swell briefly.
Clean and wash spring onions and cut into fine rings. Cut the bacon into fine strips. Fry in a pan without fat until crispy. Add spring onions and fry for 2-3 minutes, remove.
Beat the egg white and 1 pinch of salt until stiff. Fold into the dough with a whisk.
Heat the fat in a large coated pan with lid. Add the dough, cover and allow to set over a low heat until it becomes firm at the edges.
Cut the dough in half with a spatula in the middle. Turn the halves and fry them covered until golden brown. Pluck the shredded cheese into pieces with 2 forks. Spread the bacon and spring onion mixture on the pancake.
Continue frying briefly and serve immediately.