Mix the flour, milk and eggs into a pancake batter, add salt and stir in finely weighed parsley. Let the dough soak for 30 minutes. Bake 3 to 4 thin pancakes in a little butter.
Dice the ham and mix with the cheese, sour cream and finely chopped onion, season with a little pepper.
Spread the filling on the pancakes. Roll up the pancakes, place in a buttered casserole dish and bake in a preheated oven at 160 degrees (convection) for 20 minutes.