How to make Käsespätzle (German Mac n Cheese) by hand

The historians say, Spaetzle were first mentioned in 1725 for the first time. But what does not mean anything at all, because Spätzle, historically, is much, much longer, the solid foundation of the Swabian

Spätzle mit Fleischsauce ½ pck Spätzle etwas Butter etwas Salz 1 pck Pfannengyros 2 pck Rahmsauce für je 0,5l ½ pck Buttergemüse ½ pck Sahne 1 Zwiebel Pfannengyros mit Buttergemüse und Zwiebel durchbraten.

I know everyone is just waiting for someone to finally explain how to make the famous German Spätzle. Spätzle are a very popular dish in southern Germany agreed on to be the tastiest food by the ICOSL