Preparation

1. Mix the flour with the eggs, salt and water into a to a stiff dough. A few lumps of flour may also remain in the dough for texture.
2. Bring plenty of water to the boil with a little salt in a large pot. Now slice the dough into the boiling water. There are various ways to do this: slicing it by hand on a board, pressing it through the “spaetzle” pasta press or, best of all, rubbing or grating the typical small "knöpfle" pasta with the pasta grater.
3. Bring the pasta briefly to the boil and skim it off with a skimmer after 3 to 5 minutes.
4. Put a layer of pasta into a baking dish, spread grated cheese over it. Then repeat layer by layer. Place this in a hot oven until the cheese has melted.
5. Chop the onions or cut them into rings, fry them in butter until golden brown and sprinkle over the cheesy pasta before serving. Serve the cheesy pasta with green salad or an endive salad.
6. Tip: 
It's all about the cheese! Cut the Romadur (Belgian cheese) into cubes and add this to the cheese mixture. This gives an extra spicy taste that is typical for the Allgäu!