To a blender or food processor, add the spinach, eggs, milk and salt and blend until it's bright green, smooth and the spinach has broken down.
Add the flour and blend again until just combined. Alternatively, you can combine the spinach mixture with the flour in a bowl with either a whisk or wooden spoon.
Bring a pot of salted water to the boil and using any kitchen utensil with small holes in it, push the batter through directly into the water. You can use something like a colander, slotted spoon, cheese grater or a tool specifically for spaetzle called a hopper. Make sure you don't sit the tool too close to the boiling water, otherwise the batter will set and block the holes.
Boil the spaetzle for around a minute until they float to the surface of the water.
Save a cup of the pasta water and remove the spaetzle with a sieve. Serve it with any sauce or dish you like and enjoy.
